animals
When you ask someone why they are quiet
Cat got your tongue?
When you ask someone to be quiet
Zip your lip
When something is extremely expensive
Cost an arm and a leg
To try hard not to say something that would upset someone
Walking on eggshells
When it's raining very hard.
Raining cats and dogs
When you tell a secret
Let the cat out of the bag
To tell someone "good luck"
Break a leg
Two persons working together can solve a problem faster than one person
Two heads are better than one
Someone who is lazy
Couch potato
To create a situation that will cause trouble or be unpleasant
Open a can of worms
To be extremely kind and generous
Heart of gold
To hear something but not remember it
Two of a kind/something very similar
Two peas in a pod
Solve two problems with a single action
Kill two birds with one stone
When you agree with someone
See eye to eye
Listening carefully to what someone is saying
All ears
Driving a car that doesn't work well
Drive a lemon
When you admit you were wrong about something
Eat crow
Your reaction or what you think is clearly shown on your face
Written all over your face
When you are scared of something
Cold feet
When you complain about something you cannot change
Cry over spilled milk