IDIOMS AND PHRASES

IDIOMS AND PHRASES

List of Idioms A - Z

A Idioms

A big cheese- an important or a powerful person in a group or family

A bird’s eye view- a view from a very high place which allows you to see a large area

A bone of contention- something that people argue for a long time

A cock and a bull story- a story or an explanation which is obviously not true.

At the crack of the dawn- very early in morning

A cuckoo in the nest- someone in a group of people but not liked by them.

A litmus test- a method which clearly proves something

As the crow flies- measuring distance between two places in a straight line.

A dead letter- an argument or law not followed by anyone.

At the drop of the hat- u do something easily and without any preparation

An early bird- someone who gets early in the morning

An educated guess- a guess which was likely to get corrected

At the eleventh hour- be too late.

A queer fish- a strange person

A wakeup call- an event done to warn someone

A worm’s eye view- having very little knowledge about something

A witch hunt- an attempt to find and punish those who have options that are believed to be dangerous

At the heels of- to follow someone

A dish fit for Gods- something of very high quality

A game of two equal halves- a sudden change in circumstances

Afraid of one’s own shadow- to become easily frightened

Against the clock- to be in a hurry to do something before a particular time

Air one’s dirty laundry- to make public something embarrassing that should be kept secret.

All systems go- everything is ready.

An arm and a leg- a large amount of money

Appear out of now here- to appear suddenly without warning.

Apple of someone’s eye- someone loved very much.

Ask for the moon- to ask for too much.

Asleep at the switch- not to be alert on opportunity

At sixes and sevens- to be lost and bewildered

At someone’s beck and call- to be always ready to serve

At the bottom of the ladder- at the lowest level

A house of cards- a poor plan

At an arm’s length- to keep at a distance

At sixes and sevens- in disorder

A boon in disguise- a benefit in loss

A bull in a China shop- an awkward person

A red letter day- an important day

A nine days wonder- pleasure for a short time

A bit under the weather- falling ill

B idioms

Bad blood- feelings of hate between two families

Bend your ears- to talk to someone for a very long time about something boring

Bite your tongue- to stop yourself from saying something because it would be better not to

Black and blue- full of bruises

Blue blood- belonging to high social class

Be above board- to be honest and legal

Be bouncing off the walls- excited and full of nervous energy

Bow and scrap- try too hard to please someone in a position of authority

Brass monkey weather- extremely cold weather

Be tailor made- to be completely suitable for someone.

Break the ice- to make more comfort or relaxed with a person whom you have not met earlier, to break the silence

Be as clear as mud- to be impossible to understand

Be on cloud nine- be very happy

Between the devil and deep blue sea- a type of situation where u must choose between two equally unpleasant situations

Be in the doldrums- not very successful or nothing new is taking place

Beat the drum- to speak eagerly about something you support

Be on the edge- to be nervous or worried about something

Be in seventh heaven- extremely happy

Be at each other’s throat- two persons arguing angrily

Batten down the hatches- to prepare for trouble

Back the wrong horse- to support someone weak

Back to square one- to reach again to the starting point

Back to the salt mines- back to something that you don’t want to do

Ball of fire- active and energetic

Beat one’s head against the wall- to try to do something that is hopeless

Bark up the wrong tree- to make a wrong assumption 

Batten down the hatches- prepare for difficult times 

Beat one’s brain out- to work hard

Begin to see the light- to begin to understand

Behind closed doors- done in secret

Bet on the wrong horse- to misread the future

Bent on doing- to be determined to do something

Bite off more than one can chew- to do more than one’s ability

Bite the bullet- to face a difficult situation bravely

Bitter pill to swallow- an unpleasant fact that must be accepted

Black sheep of the family- worst member

Blessing in disguise- something that turns out to be good which earlier appeared to be wrong

Blind leading the blind- someone who does not understand something but tries to explain it to other

Blow one’s own horn- to praise one

Blow someone’s mind- excite someone

Bone of contention- subject matter of the fight 

Bring home the bacon- to earn money to live

Blue in the face- exhausted and speechless

Break the back of- reduce the power of something 

Burn a hole in one’s pocket- to spend money quickly 

Burn the midnight oil- to study till late of night

Bushman’s holiday- a holiday where you spend doing same thing as you did at working days

Button’s one lip- to keep quite

Break a leg- to wish good luck

C idioms 

Carrot and sticks- You use both awards as well as punishments to make someone do something.

Cloak and dragger- when people behave in a very secret manner

Cards are stacked against- luck is against you

Crack a book- to open book to study

Cross a bridge before one comes to it- worry about the future in advance

Carry coals to new castle- to take something to a place or a person that has a lot of that thing already

Cast in the same mould- to be very similar

Change horses in midstream- to change plans

Cap it all- to finish

Cried with eyes out- cried a lot

Carry the can- If you carry the can, you take the blame for something, even though you didn't do it or are only partly at fault.

Cast  a  long  shadow-  Something  or  someone  that  casts  a  long  shadow  has considerable influence on other people or events.

Cat and dog life- If people lead a cat and dog life, they are always arguing.

D idioms 

Drive a wedge between- to break relationship between the two 

Dances to the tune- to always do what someone tells you to do 

Dressed up to the nines- wearing fancy clothes

Dragging its feet- delaying in decision, not showing enthusiasm

Davey Jones' locker- Davey Jones' locker is the bottom of the sea or resting place of drowned sailors. ('Davy Jones' locker' is an alternative spelling.)

Dancing on someone's grave- If you will dance on someone's grave, you will outlive or
Outlast them and will celebrate their demise

Dog in the manger- If someone acts like a dog in the manger, they don't want other people to have or enjoy things that are useless to them

Don't cry over spilt milk- When something bad happens and nothing can be done to help it people say, 'Don't cry over spilt milk'

Don't wash your dirty laundry in public- People, especially couples, who argue in front of others or involve others in their personal problems and crises, are said to be washing their dirty laundry in public; making public things that are best left private.

Donkey work- Donkey work is any hard, boring work or task.

Don't throw bricks when you live in a glass house- Don't call others out on actions that you, yourself do. Don't be a hypocrite.

E idioms

Entering the 80th orbit- celebrating the 80th birthday

Eleventh hour decision- decision that is made at the last possible minute

End in smoke- to bear no result

Earth shattering- not at all surprising

Eat humble pie- to apologize humbly

Elephant in the room- An elephant in the room is a problem that everyone knows very well but no one talks about because it is taboo, embarrassing, etc.

Egg on your face- If someone has egg on their face; they are made to look foolish or embarrassed

Eye for an eye- This is an expression for retributive justice, where the punishment equals the crime.

Eyes are bigger than one's stomach- If someone's eyes are bigger than their stomach, they are greedy and take on more than they can consume or manage.

F idioms 

From cradle to grave- during the whole span of your life.

Face the music-to accept punishment for something you have done.

Feel the pinch- to have problems with money.

Fall on your own sword- to be cheated by someone you trust.

Feather in one’s cap- something that you achieve and proud of.

Firing on all cylinders- work every possible way to succeed.

French leave- absent without permission, to take French leave is to leave a gathering without saying goodbye or without permission.

Fall on our feet- If you fall on your feet, you succeed in doing something where there was a risk of failure.

Fall on your sword- If someone falls on their sword, they resign or accept the consequences of what they have done wrong.

Fingers and thumbs- If you are all fingers and thumbs, you are being clumsy and not very skilled with your hands.

Finger in the pie- If you have a finger in the pie, you have an interest in something.

Flash in the pan- If something is a flash in the pan; it is very noticeable but doesn't last long, like most singers, who are very successful for a while, then forgotten.

Follow your nose- When giving directions, telling someone to follow their nose means that they should go straight ahead.

Fool's paradise- A fool's paradise is a false sense of happiness or success

Foot in mouth- This is used to describe someone who has just said something
Embarrassing, inappropriate, wrong or stupid

For a song- If you buy or sell something for a song, it is very cheap

For donkey's  years-  If people have done something, usually without much if any change, for an awfully long time, they can be said to have done it for donkey's years

G idioms 

Get off the hook- free from all obligations

Give-up the ghost- to die

Got the slap on the wrist- got light punishment

Give someone a bird- make fun

Got the wind up- to be scared

Get a raw deal- not treated equally

Gift of the gab- talent of speaking, if someone has the gift of the gab, they speak in a persuasive and interesting way

Gives cold shoulder- to ignore

Get your wires crossed- If people get their wires cross, they misunderstand each other, especially when making arrangements.('Get your lines crossed' is also used.)

Give me five- If someone says this, they want to hit your open hand against theirs as a
Way of congratulation or greeting

Give me a hand- If someone gives you a hand, they help you

Give someone a piece of your mind- If you give someone a piece of your mind, you criticize them strongly and angrily.

Go bananas- If you go bananas, you are wild with excitement, anxiety, or worry

Go tell it to birds- This is used when someone says something that is not credible or is a lie

Go under the hammer- If something goes under the hammer, it is sold in an auction 

Graveyard shift- If you have to work very late at night, it is the graveyard shift 

Grease monkey- A grease monkey is an idiomatic term for a mechanic

H idioms

Have ants in your pants- not be able to keep still because you are very excited or worried about something.

Having a whole of a time- to enjoy very much

Hold one’s horse- be patient

Have a big mouth- one who gossips more or tells secret

Himalayan blunder- a serious mistake

Have a one track mind- think only of one thing

Have clean hands- be guiltless

Have an egg on the face- be embarrassed

Have eyes bigger than stomach- desiring more food than one can eat

Heart missed a beat- very excited

Heart in the right place- good natured

Hit the nail on the head- done the thing correctly

Hand to mouth- Someone who's living from hand to mouth, is very poor and needs the little money they have coming in to cover their expenses

Have no truck with- If you have no truck with something or someone, you refuse to get involved with it or them

Hit the bull's-eye- If someone hits the bull's-eye, they are exactly right about something or achieve the best result possible.

Hold water- When you say that something does or does not 'hold water', it means that the point of view or argument put forward is or is not sound, strong or logical. For e.g. 'Saying we should increase our interest rates because everyone else is doing so will not hold water'

Hornets' nest- A hornets' nest is a violent situation or one with a lot of dispute. (If you create the problem, you 'stir up a hornets' nest'.)

I idioms 

In dribs and drabs- in small amounts at a time

In black and white- to give in writing

In the blues- low spirited

In cahoots with- in a partnership usually for a dishonest reason

If the shoe fits, wear it- This is used to suggest that something that has been said might apply to a person

In droves- When things happen in droves, a lot happen at the same time or very quickly

In the doghouse- If someone is in the doghouse, they are in disgrace and very
Unpopular at the moment.

J idioms

Jack Frost - If everything has frozen in winter, then Jack Frost has visited.

Jack the Lad - A confident and not very serious young man who behaves as he wants to without thinking about other people is a Jack the Lad.

Jack-of-all-trades- A jack-of-all-trades is someone that can do many different jobs.

Jam on your face - If you say that someone has jam on their face, they appear to be caught, embarrassed or found guilty.

Jam tomorrow - This idiom is used when people promise good things for the future that will never come.

Jane Doe - Jane Doe is a name given to an unidentified female who may be party to legal proceedings, or to an unidentified person in hospital, or dead. John Doe is the male equivalent.

Jekyll and Hyde - Someone who has a Jekyll and Hyde personality has a pleasant and a very unpleasant side to the character.

Jersey justice - Jersey justice is very severe justice.

Jet set - Very wealthy people who travel around the world to attend parties or functions are the jet set.

Jet-black - To emphasise just how black something is, such as someone's hair, we can call it jet-black.

Job's comforter - Someone who says they want to comfort, but actually discomforts people is a Job's comforter.

Jobs for the boys - Where people give jobs, contracts, etc, to their friends and associates, these are jobs for the boys.

Jockey for position - If a number of people want the same opportunity and are struggling to emerge as the most likely candidate, they are jockeying for position.

Jog my memory- If you jog someone's memory, you say words that will help someone trying to remember a thought, event, word, phrase, experience, etc.

John Doe- John Doe is a name given to an unidentified male who may be party to legal proceedings, or to an unidentified person in hospital, or dead. Jane Doe is the female equivalent.

Joe Public - Joe Public is the typical, average person.

Johnny on the spot - A person who is always available; ready, willing, and able to do what needs to be done.('Johnny-on-the-spot' is also used.)

Johnny-come-lately - A Johnny-come-lately is someone who has recently joined something or arrived somewhere, especially when they want to make changes that are not welcome.

Join the club - Said when someone has expressed a desire or opinion, meaning "That viewpoint is not unique to you". It can suggest that the speaker should stop complaining since many others are in the same position. Example: "If this train doesn't come, I'll be late for work!" "Join the club!"

Joined at the hip - If people are joined at the hip, they are very closely connected and think the same way.

Judge, jury and executioner - If someone is said to be the judge, jury, and executioner, it means they are in charge of every decision made, and they have the power to be rid of whomever they choose.

Juggle frogs - If you are juggling frogs, you are trying to do something very difficult.

Jump down someone's throat - If you jump down someone's throat, you criticise or chastise them severely.

Jump on the bandwagon - If people jump on the bandwagon, they get involved in something that has recently become very popular.

Jump ship - If you leave a company or institution for another because it is doing badly, you are jumping ship.

Jump the broom - To jump the broom is to marry. (Jump over the broom, jump over the broomstick, jump the broomstick are also used.)

Jump the gun - If you jump the gun, you start doing something before the appropriate time.

Jump the track - Jumping the track is suddenly changing from one plan, activity, idea, etc, to another.

Jump through hoops - If you are prepared to jump through hoops for someone, you are prepared to make great efforts and sacrifices for them.

Jump to a conclusion - If someone jumps to a conclusion, they evaluate or judge something without a sufficient examination of the facts.

Jumping Judas! - An expression of surprise or shock.

Jungle out there - If someone says that it is a jungle out there, they mean that the situation is dangerous and there are no rules.

Jury's out - If the jury's out on an issue, then there is no general agreement or consensus on it.
Just around the corner- If something is just around the corner, then it is expected to happen very soon.

Just coming up to - If the time is just coming up to nine o'clock, it means that it will be nine o'clock in a very few seconds. You'll hear them say it on the radio in the morning.

Just deserts - If a bad or evil person gets their just deserts, they get the punishment or suffer the misfortune that it is felt they deserve.

Just for the heck of it - When someone does something just for the heck of it, they do it without a good reason.

Just for the record - If something is said to be just for the record, the person is saying it so that people know but does not necessarily agree with or support it.
Just in the nick of time - If you do something in the nick of time, you just manage to do it just in time, with seconds to spare.

Just off the boat - If someone is just off the boat, they are naive and inexperienced.

Just what the doctor ordered - If something's just what the doctor ordered, it is precisely what is needed.

Justice is blind - Justice is blind means that justice is impartial and objective.

K idioms

Kick up a row- to start a fight, to create disturbance

Keep ones eye on the ball- be ready for something

Kangaroo court- When people take the law into their own hands and form courts that are not legal, these are known as kangaroo court

Keep body and soul together- If you earn enough to cover your basic expenses, but nothing more than that, you earn enough to keep body and soul together.

Keep your eye on the ball- If you keep your eye on the ball, you stay alert and pay
Close attention to what is happening

Know which way the wind blows- This means that you should know how things are
Developing and be prepared for the future.

L idioms

Loaves and fishes- done for material benefits

Like a shag on a rock- completely alone.

Let someone slide- neglect something

Let the cat out of the bag- reveal the secret

Let nature take its course- to allow someone to live or die naturally.

Like a sitting duck- totally unaware

Lion’s share- a major share

Left to your own devices- If someone is left to their own devices, they are not controlled and can do whatever they want

M idioms

Make castles in the air- plans or hopes that have very little chances of happening.

Make a bee line for- to go directly towards something.

Make ones bed and lie on it- to be responsible for what you have done and accept the results

Meet ones waterloo- meet ones final end 

Monkey around- to waste time here and there 

My hands are full- I am busy

Make a dry face- show disappointment

Make a monkey of someone- If you make a monkey of someone, you make them look foolish

Man of his word- A man of his word is a person who does what he says and keeps his Promises

Many moons ago- A very long time ago

N idioms

Nobody’s fool- one who can take care of himself 

not having a leg to stand for- not having proof 

Never-never land- ideal best place.

No love lost between- dislike

Needle in a haystack- If trying to find something is like looking for a needle in a haystack, it means that it is very difficult, if not impossible to find among everything around it

New brush sweeps clean- 'A new brush sweeps clean' means that someone with a new perspective can make great changes. However, the full version is 'a new brush sweeps clean, but an old brush knows the corners', which warns that experience is also a valuable thing

No smoke without fire- This idiom means that when people suspect something, there is
Normally a good reason for the suspicion, even if there is no concrete evidence. ('Where's there's smoke, there's fire' is also used.)

O idioms

Once in a blue moon- very rarely

On the bandwagon- doing something because others are also doing it

Open Pandora’s box- to discover more problems

Over the moon- being too happy

On its last legs- in a bad condition and will not last long

Old flames die hard- It's very difficult to forget old things

On pins and needles- If you are on pins and needles, you are very worried about something

On the carpet- When you are called to the bosses office (since supposedly, they are the only ones who have carpet) and its definitely not for a good reason, i.e., you are in trouble,  something  has  not  gone  according  to  plan  and  either  maybe  you  are responsible and/or have some explaining to do

On the hook- If someone is on the hook, they are responsible for something.

Only the wearer knows where the shoe pinches- This means that it's hard to know how much someone else is suffering.

P idioms 

Pass muster- to be approved

Pick someone to pieces- to criticize sharply

Paper over the cracks- to try to hide something

Put the cart before the horse- doing things in a wrong manner

Pull up the shocks- do things in the right manner and correctly

Parrot fashion- If you learn something parrots fashion; you learn it word for word

Pay on the nail- If you pay on the nail, you pay promptly in cash

Pen is mightier than the sword- The idiom 'the pen is mightier than the sword' means that words and communication are morepowerful than wars and fighting

Pick someone’s brains- If you pick someone's brains, you ask them for advice,
Suggestions and information about something they know about

Pieces of the same cake- Pieces of the same cake are things that have the same
Characteristics or qualities

Play fast and loose- If people play fast and loose, they behave in an irresponsible way
And don't respect rules, etc.

Poker face- Someone with a poker face doesn't show any emotion or reaction so that
People don't know what they are feeling

Q idioms

Quarrel with bread and butter- Bread and butter, here, indicate the means of one’s living. If a sub-ordinate in an organization is quarrelsome or if he is not patient enough to bear the reprimand he deserves, gets angry and retorts or provokes the higher-up, the top man dismisses him from the job. So, he loses the job that gave him bread and butter. Hence we say, he quarreled with bread and butter (manager or the top man) and lost his job

Quiet as a cat- If somebody is as quiet as a cat they make as little noise as possible and try to be unnoticeable

Quiet as a mouse- If someone's as quiet as a mouse, they make absolutely no noise

Queer fish- A strange person is a queer fish

R idioms

Round the twist- go crazy

Read between the lines- read hidden meanings

Rack and ruin- If something or someone goes to rack and ruin, they are utterly destroyed or wrecked

Rain on your parade- If someone rains on your parade, they ruin your pleasure or your plans

Rake someone over the coals- If you rake someone over the coals, you criticize or scold them severely

Recipe for disaster- A recipe for disaster is a mixture of people and events that could only possibly result in trouble

Red carpet- If you give someone the red-carpet treatment, you give them a special
Welcome to show that you think they are important

Red herring- If something is a distraction from the real issues, it is a red herring

Red letter day- A red letter day is a one of good luck, when something special happens to you

Reduce to ashes- If something is reduced to ashes, it is destroyed or made useless. His infidelities reduced their relationship to ashes

Round the houses- If you go round the houses, you do something in an inefficient way when there is a quicker, more convenient way

Rub shoulders- If you rub shoulders with people, you meet and spend time with them,
Especially when they are powerful or famous

Run into the sand- If something runs into the sand, it fails to achieve a result

S idioms 

Salt on the earth- fundamental good people

Sands of time- tiny amounts of time

Shake a leg- to go fast, hurry

Spill the beans- to expose a secret

Snake in the grass- a hidden army

Salt on the earth- fundamental good people

Sands of time- tiny amounts of time

Shake a leg- to go fast, hurry

Spill the beans- to expose a secret

Snake in the grass- a hidden army

Snake in the shoes- to be in a state of fear 

Stood to his guns- maintained to his opinion 

showing the door- asking someone to leave 

Song and a dance- an excuse

Salad days- Your salad days are an especially happy period of your life

Sail under false colors- Someone who sails under false colors is hypocritical or
Pretends to be something they aren't in order to deceive people

T idioms

Threaded his way out- walked carefully through.

Take the cloth- to become a priest.

Talk turkey- to discuss a problem with a real intension to solve it.

Tit for tat- an action done to revenge against a person who has done some wrong to you

To crow over- to triumph over someone

 to blow a fuse- to turn someone angry

though thick and thin- under all conditions 

to bell the cat- to take great risks

To look through colored glasses- to look the things not as they are

Taking to a brick wall- taking with a no response

Turned a deaf ear- disregarded

Take a back seat- choose to decrease involvement

Tables are turned- When the tables are turned, the situation has changed giving the advantage to the party who had previously been at a disadvantage

Take someone under your wing- If you take someone under your wing, you look after them while they are learning something

Take your medicine- If you take your medicine, you accept the consequences of something you have done wrong

Talking to a brick wall- If you talk to someone and they do not listen to you, it is like talking to a brick wall

Taste of your own medicine- If you give someone a taste of their own medicine, you do something bad to someone that they have done to you to teach them a lesson 

The apple does not fall far from the tree- Offspring grow up to be like their parents 

Through thick and thin- If someone supports you through thick and thin, they support you during good times and bad

U idioms

Upset the apple cart- to create difficulty

Under a cloud- If someone is suspected of having done something wrong, they are under a cloud

Under fire- If someone is being attacked and criticized heavily, they are under fire

Under your nose- If something happens right in front of you, especially if it is surprising or audacious, it happens under your nose

Up for grabs- If something is up for grabs, it is available and whoever is first or is successful will get it

Up to the neck- If someone's in something up to the neck, they are very involved in it, especially when it's something wrong

Up a river without a paddle- If you up a river without a paddle, you are in an unfortunate situation, unprepared and with none of the resources to remedy the matter

Uncharted waters- If you're in uncharted waters, you are in a situation that is unfamiliar to you, that you have no experience of and don't know what might happen

Under lock and key- If something is under lock and key, it is stored very securely

V idioms

Vale of tears- This vale of tears is the world and the suffering that life brings.

Velvet glove - This idiom is used to describe a person who appears gentle, but is determined and inflexible underneath. ('Iron fist in a velvet glove' is the full form.)

Vent your spleen - If someone vents their spleen, they release all their anger about something.

Vicar of Bray - A person who changes their beliefs and principles to stay popular with people above them is a Vicar of Bray

Vicious circle - A vicious circle is a sequence of events that make each other worse- someone drinks because they are unhappy at work, then loses their job... 'Vicious cycle' is also used.

Vinegar tits - A mean spirited women lacking in love or compassion.

Virgin territory - If something is virgin territory, it hasn't been explored before.

Voice in the wilderness - Someone who expresses an opinion that no one believes or listens to is a voice in the wilderness,especially if proved right later.

Volte-face - If you do a volte-face on something, you make a sudden and complete change in your stance or position over an issue.
Vultures are circling - If the vultures are circling, then something is in danger and its enemies are getting ready for the kill.

W idioms

Weight one’s word- be careful to what one says

Wait for a raindrop in the drought- When someone is waiting for a raindrop in the drought, they are waiting or hoping for something that is extremely unlikely to happen

Walking on broken glass- When a person is punished for something

Wet behind the ears- Someone who is wet behind the ears is either very young or inexperienced

Whale of a time- If you have a whale of a time, you really enjoy yourself

Work your fingers to the bone- If you work your fingers to the bone, you work extremely hard on something

Wrench in the works- If someone puts or throws a wrench, or monkey wrench, in the works, they ruin a plan

X idioms

X factor - The dangers for people in the military that civilians do not face, for which they receive payment, are known as the X factor.
X marks the spot - This is used to say where something is located or hidden.
X-rated - If something is x-rated, it is not suitable for children.

Y idioms

Yah boo sucks- Yah boo & yah boo sucks can be used to show that you have no sympathy with someone.

Yank my chain - If some one says this to another person (i.e. stop yanking my chain) it means for the other person to leave the person who said it alone and to stop bothering them.

Yell bloody murder -  If someone yells bloody murder, they protest angrily and loudly, or scream in fear.

Yellow press - The yellow press is a term for the popular and sensationalist newspapers.

Yellow streak- If someone has a yellow streak, they are cowardly about something.

Yellow-bellied - A yellow-bellied person is a coward.

Yen - If you have a yen to do something, you have a desire to do it.

Yeoman's service -  To do yeoman's service is to serve in an exemplary manner.

Yes-man - Someone who always agrees with people in authority is a yes-man.

Yesterday's man or Yesterday's woman - Someone, especially a politician or celebrity, whose career is over or on the decline is yesterday's man or woman.

You are what you eat - This is used to emphasise the importance of a good diet as a key to good health.

You can catch more flies with honey than with vinegar - This means that it is easier to persuade people if you use polite arguments and flattery than if you are confrontational.

You can choose your friends, but you can't choose your family - Some things you can choose, but others you cannot, so you have to try to make the best of what you have where you have no choice.

You can lead a horse to water, but you can't make it drink - This idiom means you can offer something to someone, like good advice, but you cannot make them take it.
You can say that again - If you want to agree strongly with what someone has said, you can say 'You can say that again' as a way of doing so.

You can't fight City Hall - This phrase is used when one is so cynical that one doesn't think one can change their Representatives. The phrase must have started with frustration towards a local body of government.

You can't have cake and the topping, too - This idiom means that you can't have everything the way you want it, especially if your desires are contradictory.

You can't have your cake and eat it - This idiom means that you can't have things both ways. For example, you can't have very low taxes and a high standard of state care. 

You can't hide elephants in mouse holes - means that some issues/problems/challenges cannot be hidden/concealed but have to be faced and dealt with.

You can't make a silk purse out of a sow's ear - If something isn't very good to start with, you can't do much to improve it.
You can't make an omelette without breaking eggs - This idiom means that in order to achieve something or make progress, there are often losers in the process.

You can't take it with you - Enjoy life, enjoy what you have and don't worry about not having a lot, especially money...because once you're dead, 'you can't take it with you.' For some, it means to use up all you have before you die because it's no use to you afterwards.

You can't teach an old dog new tricks - It is difficult to make someone change the way they do something when they have been doing it the same way for a long time

You can't un-ring a bell - This means that once something has been done, you have to live with the consequences as it can't be undone.

You could have knocked me down with a feather - This idiom is used to mean that the person was very shocked or surprised.

You do not get a dog and bark yourself -  If there is someone in a lower position who can or should do a task, then you shouldn't do it.

You get what you pay for - Something that is very low in price is not usually of very good quality.

You reap what you sow - This means that if you do bad things to people, bad things will happen to you, or good things if you do good things. It is normally used when someone has done something bad.

You said it!- Used to say you agree completely with something just said.
You scratch my back and I'll scratch yours - This idiom means that if you do something for me, I'll return the favour.

You what? - This is a very colloquial way of expressing surprise or disbelief at something you have heard. It can also be used to ask someone to say something again.

You're toast - If someone tells you that you are toast, you are in a lot of trouble.

You've got rocks in your head -  Someone who has acted with a lack of intelligence has rocks in their head.

You've made your bed- you'll have to lie in it - This means that someone will have to live with the consequences of their own actions.

Young blood - Young people with new ideas and fresh approaches are young blood.

Young Turk - A Young Turk is a young person who is rebellious and difficult to control in a company, team or organisation.

Your belly button is bigger than your stomach - If your belly button is bigger than your stomach, you take on more responsibilities than you can handle.

Your call - If something is your call, it is up to you to make a decision on the matter.

Your name is mud - If someone's name is mud, then they have a bad reputation.

Your sins will find you out - This idiom means that things you do wrong will become known.

Z idioms

Zero hour- The time when something important is to begin is zero hour.

Zero tolerance - If the police have a zero tolerance policy, they will not overlook any crime, no matter how small or trivial.

Zigged before you zagged - If you did things in the wrong order, you zigged before you zagged.

Zip it - This is used to tell someone to be quiet.

Zip your lip - If someone tells you to zip your lip, they want to to shut up or keep quiet about something. ('Zip it' is also used.)