“Cry over spilled milk”

“Costs an arm and a leg”

Very expensive.

“Take it with a grain of salt”

To not completely believe something.

“Keep an eye on”

To watch or monitor carefully.

“Speak of the devil”

The person you were talking about appears.

“Pull someone’s leg”

To joke or trick someone playfully.

“Burn the midnight oil”

To work late into the night.

“A picture is worth a thousand words”

An image can express more than words.

“When pigs fly”

Something that will never happen.

“Let the cat out of the bag”

To reveal a secret accidentally or intentionally.

“Curiosity killed the cat”

Being too curious can cause trouble.

“Make a long story short”

To summarize briefly.

“The best of both worlds”

A situation where you enjoy two different advantages.

“Burn bridges”

To destroy relationships so you cannot return to them.

“Under the weather”

Feeling slightly ill or unwell.

“A blessing in disguise”

Something that seems bad but turns out good.

“Don’t judge a book by its cover”

Don’t judge by appearance.

“Get cold feet”

To become nervous and change your mind.

“Hold your horses”

To wait or be patient.

“See eye to eye”

To agree completely.

“Out of the blue”

Unexpectedly.