Raining cats and dogs.
Raining very hard
Apple of my eye.
Cherished above all others
Tie the knot
To get married
Written all over you face.
How you feel about something is clearly shown on your face
On cloud nine.
Very happy
Let the cat out of the bag.
To tell a secret
Couch potatoe.
Someone who is lasy
Feeling blue.
To be sad.
Time fly.
Time passes very quickly
Bent out of shape.
Angry
Holy cow.
What a surprise
Bad egg
Someone who behaves in a bad or dishonest way
Tickled pink.
Very pleased
Heart of gold.
To be extremely kind and generous
Out on a limb.
Risky situation
Eat crow.
To admit you were wrong about something
Cry over spilled milk.
Complain about something you can not change
Steal the show.
To get all the attention and praise at an event or performance
Loose your head.
To be overly emotional and not thinking staright
Money talks.
Money gives people power and influence over people, for good and bad.
Kill two birds with one stone.
To solve two problems at one time with a single action
Two peas in a pod.
Very similar
Jump the gun.
To do something before it should be done
Like taking candy from a baby.
Extremely easy
Cat got your tongue.
Why aren't you saying anything