What idiom is it?
A piece of cake
What idiom is it?
When pigs fly
What idiom is it?
Under the weather
What idiom is it?
Keep your chin up
What idiom is it?
Break a leg!
What idiom is it?
It's raining cats and dogs
What idiom is it?
Hit the books
What idiom is it?
Cost an arm and a leg
What idiom is it?
Spill the beans
What idiom is it?
Out of the blue