Idioms

cost an arm and a leg

To be extremely expensive; to cost far more than expected or seems reasonable.

couch potato

A person who spends a lot of time sitting/lying on the couch, usually watching TV and being physically inactive.

could not care less

To not care at all; to be completely indifferent about something.

count your blessings

Be grateful for what you have, especially instead of complaining about what you lack.

count your chickens

To assume success or benefits before they’re certain; to be overconfident about an outcome.

count your chickens before they hatch

Don’t assume you’ll succeed or get something before it actually happens; plans based on uncertain outcomes can disappoint.

cover your bases

To take precautions and prepare for different possibilities so you’re protected if things change or go wrong.

crack the whip

To use strict control or pressure to make people work harder or obey rules.

crash and burn

To fail badly and suddenly, often in a dramatic or embarrassing way.

cream of the crop

The very best people or things in a group; the top quality or most excellent.

cross that bridge when you come to it

Deal with a problem only when it actually happens, rather than worrying about it in advance.

cross your fingers

To hope that something will happen as you want, often relying on luck rather than control.

cry over spilled milk

To waste time being upset about something that already happened and can’t be changed.

cry wolf

To raise a false alarm or make repeated untrue claims of danger, causing others to stop believing you—even when it’s real.

crystal clear

Extremely clear and easy to understand; unmistakable.

curiosity killed the cat

Being too curious or nosy can get you into trouble or harm you.

cut and dried

Already decided, prepared, or settled in advance; not open to change or debate.

cut corners

To do something in the cheapest or easiest way by skipping steps or standards, often reducing quality, safety, or thoroughness.

cut someone some slack

Be less strict or critical; allow someone a break or extra tolerance in a situation.

cut the cord

To become independent from a person or organization you relied on (often family/parents); also used for stopping cable TV service.

cut the mustard

To be good enough; to meet the required standard or expectations.

cut to the chase

Get to the main point immediately, skipping unnecessary details or preliminaries.

cut your losses

Stop an unprofitable effort to prevent further loss; accept what’s already lost and move on.

cut your teeth

To gain your first real experience and become skilled by starting with basic or early work in a field.

dark horse

A little-known person or team who unexpectedly succeeds or is likely to win.

dawn of a new day

The beginning of a new period that brings change, hope, or fresh opportunities.

day in, day out

Every day, repeatedly and routinely over a long period; day after day.

dead as a doornail

Completely dead, finished, or no longer functioning; beyond any chance of recovery or return.

dead in the water

Unable to move forward or make progress; stalled with no effective power or momentum.

dead ringer

Someone or something that looks extremely like another person or thing; an exact look-alike.

dead to the world

Sleeping so deeply that you don’t notice anything happening around you.

deal with a full deck

Not a widely recognized English idiom; it’s usually a literal card-playing phrase meaning to deal cards using a complete deck (all cards present).

devil is in the details

Small, overlooked details can cause serious problems or determine success, so careful attention is needed.

devil's advocate

A person who deliberately argues an opposing view to test ideas, expose weaknesses, or stimulate discussion, not necessarily because they disagree.

diamond in the rough

A person or thing with great potential or value that is not yet refined, developed, or recognized.

different kettle of fish

A completely different situation, topic, or problem than the one being discussed.

dig in your heels

To refuse to change your mind; to become stubbornly resistant to pressure or compromise.

dig your heels in

To refuse to change your mind or give way; to become stubborn and resist pressure.

dig your own grave

To cause your own downfall or get yourself into serious trouble through your own actions.

dime a dozen

Very common and easy to find; not special or valuable because there are so many of them.

disappear into thin air

To vanish suddenly and completely, often mysteriously, leaving no trace.

dish it out

To give something (especially criticism, insults, blame, or punishment) freely and often harshly, as if serving it to others.

do a double take

To react with sudden surprise and look again because you think you mis-saw or misheard something.

do or die

A situation where you must succeed or face very serious consequences; an all-or-nothing moment requiring maximum effort.

dog days

The hottest, most sluggish period of summer; by extension, a dull or slow time.

dog-eat-dog

Describes a situation where people compete ruthlessly and act selfishly to succeed, often with little regard for others.

don't count your chickens before they hatch

Don’t assume a good result or make plans based on it before it’s certain; avoid acting as if success is guaranteed.

don't give up your day job

A joking way to say someone isn’t good enough at a skill to make it their main career, so they should keep their regular job.

don't shoot the messenger

Don’t blame or punish the person who delivers bad news; they’re not responsible for the problem.

don’t beat a dead horse

Don’t waste time arguing or working on something that’s already decided, finished, or impossible to change.