Idioms

barking mad

Extremely crazy or mentally unbalanced; acting in a wildly irrational way.

barking up the wrong tree

To pursue the wrong person/idea or blame the wrong cause; to be mistaken about where the problem or solution lies.

bat an eye

To show any sign of surprise, concern, or reaction; most often used in the negative to mean showing no reaction.

bat out of hell

Extremely fast; moving or doing something at top speed, often suddenly and recklessly.

be all ears

To listen very carefully and with full attention; eager to hear what someone will say.

be all over someone

To touch, kiss, or flirt with someone very eagerly (often annoyingly); also, to criticize or monitor someone intensely.

be at sixes and sevens

To be in confusion or disorder; to be disorganized or unsure what to do.

be in hot water

To be in trouble or facing criticism/punishment because of something you did.

be in the same boat

To be in the same difficult situation as someone else; share the same problems or circumstances.

be on cloud nine

To feel extremely happy or delighted; to be in a state of euphoria.

be on the safe side

To act cautiously to avoid risk or problems, especially when you are unsure about the situation.

be on the same wavelength

To think similarly and understand each other easily; to be in sync mentally.

be out of line

To behave improperly or say/do something unacceptable, rude, or beyond what’s appropriate.

be out of the woods

To be past the worst part of a danger or difficulty; no longer at serious risk, though recovery may not be fully complete.

be over the moon

To be extremely happy, delighted, or thrilled about something.

beat a dead horse

To keep discussing or trying to achieve something that is already settled, finished, or hopeless, wasting time and effort.

beat around the bush

To avoid saying something directly; to speak indirectly or evasively instead of getting to the point.

beat it

To leave immediately; often used as a blunt command telling someone to go away.

beat the clock

Finish something before a deadline or before time runs out.

beat the rap

Avoid being convicted or punished for a crime or wrongdoing, often by escaping legal consequences.

beat the system

To outsmart or bypass rules/procedures to gain an advantage, often by exploiting loopholes.

beating a dead horse

Continuing to pursue or argue a point that is settled or hopeless; wasting effort on something futile.

behind closed doors

In private; secretly; away from public view, often implying confidentiality or lack of transparency.

behind the eight ball

In a difficult, disadvantaged position, especially due to bad timing, mistakes, or factors beyond your control.

bend over backwards

To make an extreme effort to help someone or achieve something, often more than is reasonable or necessary.

bend the rules

To interpret or apply rules less strictly than intended, usually to allow an exception without fully breaking them.

benefit of the doubt

To assume someone is telling the truth or has good intentions when you’re not sure, choosing to trust them rather than suspect them.

best foot forward

To make a strong, positive impression by behaving or performing at your best, especially at the start of something.

best of both worlds

A situation where you can enjoy the advantages of two different options at the same time.

best thing since sliced bread

Someone or something considered extremely good, useful, or impressive—often as enthusiastic praise, sometimes with irony.

bet your bottom dollar

Be very sure something is true or will happen; you can be confident about it.

better late than never

It’s preferable to do something late than not do it at all.

better safe than sorry

It’s wiser to be cautious now than to risk problems or regret later.

between a rock and a hard place

In a difficult situation where every available choice has bad consequences; stuck between two undesirable options.

between the devil and the deep blue sea

In a situation with two bad choices, where avoiding one problem means facing another.

beyond a shadow of a doubt

With complete certainty; without any doubt at all.

bide your time

To wait patiently for the right moment to act or take advantage of an opportunity.

big fish in a small pond

A person who is important or influential in a small group or limited setting, but not necessarily beyond it.

big picture

The overall situation or main idea, focusing on broad context rather than small details.

bite off more than you can chew

To take on a task or responsibility that is too difficult or too much to handle.

bite the bullet

To face an unpleasant or difficult situation bravely and do it because it’s necessary, even though you don’t want to.

bite the dust

To die, or (informally) to fail, be defeated, or stop working.

bite your tongue

To stop yourself from speaking, especially to avoid saying something rude, revealing, or regrettable.

bitter pill to swallow

An unpleasant truth or situation that is hard to accept.

black and blue

Badly bruised, showing dark bruises on the skin (often after a hit or fall).

black sheep

A person seen as different from others in a family or group, often viewed as a disgrace or outsider.

bless your heart

Used to express sympathy or gentle pity; in some contexts (especially Southern US) it can be a polite-sounding insult meaning someone is naïve, foolish, or hopeless.

blessing in disguise

Something that seems bad or unlucky at first but turns out to be beneficial in the end.

blow a fuse

To suddenly lose your temper; to become very angry (or, less often, for a device to stop working when a fuse burns out).

blow a gasket

To suddenly become very angry or lose your temper; to “explode” with rage.