Continuing with some more Idioms:
You Rock : You are great
See eye to eye: Agreeing with someone.
When pigs fly: Something that will never happen
Let the cat out of the bag: To accidentally reveal a secret
Let your freak flag fly: Let others see your uniqueness
Let the chips fall where they may: To let something happen no matter what happens next
Cry over spilt milk: When you complain about a loss from the past.
Don't count your chickens before the eggs have hatched: Don't make plans for something that might not happen.
It takes two to tango: Actions or communications need more than one person
Jump on the bandwagon: Join a popular trend or activity
You can’t judge a book by its cover: To not judge someone or something based solely on appearance.
By the skin of your teeth: You only just succeed or you have nearly failed.