What does it mean
Piece of cake
that was easy
to joke or tease
pull someone's leg
A little birdie told me
someone told you a secret
at the drop of a hat
to do something right away
hit the books
study very seriously
Break a leg
Good luck
i'm not feeling well
under the weather
slipped my mind
I forgot, I did not remember
apple of my eye
to cherish or prize something or someone above all else
things would look up
things would improve
sleep on it
i'm going to think about it
to reveal a secret
to spill the beans
hold your horses
wait a minute, slow down
take the bull by the horns
to tackle or go after something hard or challenging
make your move
take action
out of the blue
i'm listening to you
i'm all ears
in hot water
to be in trouble
time is money
time is valuable, do not waster your time
turn over a new leaf
to change for the better
when pigs fly
it's never going to happen
someone stays up late working hard
to burn the midnight oil
once in a blue moon
something that happens very rarely
beat around the bush
avoid a subject or question by talking about topics not related to subject or question
hit the nail on the head
to be exactly right