Which idiom is that?
A piece of cake.
Which idiom is that?
It's raining cats and dogs.
Which idiom is that?
To break a leg.
Which idiom is that?
To burn bridges.
Which idiom is that?
Cool as a cucumber.
Which idiom is that?
Cat got your tongue?
Which idiom is that?
To cost an arm and a leg.
Which idiom is that?
Once in a blue moon.