Once in a blue moon
Something that happens very rarely
Let the cat out of the bag
Reveal a secret unintentionally
Cost an arm and a leg
Very expensive
A piece of cake
Very easy
Eat your words
Admit you were wrong about something
Pull someone's leg
To joke or tease someone
On the fence
Undecided about something
Bite the bullet
To face something difficult or unpleasant with courage
Hit the hay
Go to bed
Burn the midnight oil
Work late into the night
Break the ice
Start a conversation in a socially awkward situation
Catch some Z’s
To sleep
A blessing in disguise
Something that seems bad at first but turns out to be good.
Throw in the towel
To give up or admit defeat.
Hit the nail on the head
Get something exactly right.
The ball is in your court
It’s your turn to take action
Kick the bucket
To die
Blow off steam
Release pent-up emotions or energy.
Bark up the wrong tree
Pursue the wrong course of action or blame the wrong person.
Caught red-handed
Caught in the act of doing something wrong.