killing two birds with one stone
getting two things done with one action
When pigs fly
not likely to happen
Blind as a bat
can't see very well
Break a leg
good luck, hope they perform well
It's a piece of cake.
It's very easy.
in the dumps
depressed or sad
My car is a lemon.
The car is no good.
Beating about the bush
not getting to the point
It's raining cats and dogs.
It is raining a great deal.
I'm on cloud 9.
I am very happy.
I lost my head.
I got angry or upset.
My lips are sealed.
I won't tell.
like a fish out of water
very uncomfortable
walking on eggshells
trying really hard not to upset someone
has a heart of gold
is very kind
a coach potato
a lazy person
under the weather
not feeling well
time flies
time goes by quickly
let the cat out of the bag
told the secret
spill the beans
tell the secret