1
A piece of cake
Very easy
Break a leg
Good luck!
Cost an arm and a leg
Very expensive
Call it a day
To stop working
Pull someone's leg
Joke or pull a prank on someone
Caught red-handed
To catch someone doing something wrong
To join in on a trend
Speak directly
Under the weather
Feeling sick
Bite the bullet
To face a difficult situation
Go the extra mile
To do an extra effort
Burning the midnight oil
To stay up late working on something
Cut to the chase
To get to the point
Once bitten, twice shy
To become catious after an incident
For the birds
Worthless or a waste of time
Elephant in the room
An obvious problem nobody acknowledges
On a roll
A period of continuous luck or success
Kick the bucket
To die
Let the chips fall where they may
Whatever will be, will be / Go with the flow
Fall off the wagon
Return to a bad habit or unhealthy behavior after a period of improvement
Get even
To get revenge
Run circles around someone
To outperform somebody
Take a rain check
Decline an offer or invitation, but leave it for later
How do you like them apples?
To mock someone after gaining a victory, "what do you think about that"
By the skin of your teeth
Barely or narrowly done