It's raining cats and dogs.
It is raining very heavily.
Kill two birds with one stone.
The take care of two problems at the same time.
Let the cat out of the bag.
To give away a secret.
Beating around the bush.
To avoid or delay saying something uncomfortable.
Read between the lines.
To find the hidden meaning in a statement.
Bob's your uncle.
It's done. Often used after a set of simple instructions.
Bite the bullet.
To do something that is unpleasant because you know need to do it eventually.
Break a leg.
Good luck.
Hang in there.
Don't give up.
Speak of the devil.
The person you were talking about suddenly shows up.
We'll cross that bridge when we come to it.
Don't worry about that problem until it happens.
Miss the boat.
To lose an opportunity because you acted too slowly.
Cutting corners.
To do something quickly and poorly to save time or money.
A blessing in disguise.
A good thing that seemed bad a first.
Kick the bucket.
To die.
You live and you learn.
To make a mistake.
