“When pigs fly”

“Wrap one's head around something”

To understand something complicated.

“Beat a dead horse”

To waste time on something already decided.

“Beggars can’t be choosers”

People with no options must accept what they get.

“Better late than never”

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

“A dime a dozen”

Very common and easy to find; not special or valuable.

“Speak of the devil”

The person you were talking about appears.

“Break a leg”

A way to wish someone good luck.

“Ball is in your court”

It is your decision or responsibility now.

“Costs an arm and a leg”

Very expensive.

“Get out of hand”

To become uncontrollable.

“A picture is worth a thousand words”

An image can express more than words.

“A blessing in disguise”

Something that seems bad but turns out good.

“Beat around the bush”

To avoid saying something directly.

“Bite off more than you can chew”

To take on too much responsibility.

“Spill the beans”

To reveal secret information.

“Kill two birds with one stone”

To achieve two goals with one action.

“Under the weather”

Feeling slightly ill or unwell.

“Time flies”

Time passes very quickly.

“Once in a blue moon”

Very rarely.

“Actions speak louder than words”

What people do is more important than what they say.