“Back against the wall”

“Burn the midnight oil”

To work late into the night.

“Spill the beans”

To reveal secret information.

“When pigs fly”

Something that will never happen.

“Break a leg”

A way to wish someone good luck.

“Barking up the wrong tree”

To make a wrong assumption.

“Bite the bullet”

To face a difficult or unpleasant situation bravely.

“Break the ice”

To do or say something that makes people feel more comfortable in a new or awkward situation.

“Hit the nail on the head”

To describe exactly what is causing a situation or problem.

“Beat a dead horse”

To waste time on something already decided.

“Actions speak louder than words”

What people do is more important than what they say.

“Under the weather”

Feeling slightly ill or unwell.

“Better late than never”

Doing something late is better than not doing it at all.

“Time flies”

Time passes very quickly.

“Speak of the devil”

The person you were talking about appears.

“Wrap one's head around something”

To understand something complicated.

“Costs an arm and a leg”

Very expensive.

“Let the cat out of the bag”

To reveal a secret accidentally or intentionally.

“Cut corners”

To do something cheaply or badly to save time or money.

“A picture is worth a thousand words”

An image can express more than words.

“Bite off more than you can chew”

To take on too much responsibility.