To die.
To kick the bucket.
To go to bed.
To hit the hay.
To be expensive.
To cost an arm and a leg.
To do or say something that is exactly right.
To hit the nail on the head.
To be unwell
To be under the weather.
To reveal secret information unintentionally or indiscreetly.
To spill the beans.
To miss an opportunity or chance.
To miss the boat.
Not to judge someone or something based only on what you see on the outside or only on what you perceive without knowing the full situation.
To not judge a book by its cover.
To be in full agreement.
To see eye to eye.
To get something unpleasant over with.
To bite the bullet.
To not do something properly.
To cut corners.
To discuss a matter without coming to the point.
To beat around the bush.
To get to the bottom of something.
To find out the truth about something.
Hold your horses.
Be patient. Wait.
To fail to persist, be discarded
To fall by the wayside.
It is unwise to make plans based on something that hasn't happened.
Don't count your chickens before they hatch.
To sample the same unpleasantness you‘ve been dishing out to others.
To get a taste of your own medicine.
To deal decisively with a difficult or dangerous situation.
To fight against an opponent by using the same methods or weapons that the opponent uses.
To fight fire with fire.
To commit an avoidable error in which something good or of value is eliminated when trying to get rid of something unwanted.
To throw out the baby with the bathwater.
It's all Greek to me.
I don't understand it.
It's not my cup of tea.
It isn't something I like.
It's a piece of cake.
It's easy.
Break a leg!
Good luck!
To sit on the fence.
To not be willing or able to make a decision about something.