A bull in a china shop (someone who is clumsy)

Costs an arm and a leg (very expensive)

Give it a shot (Give it a go)

Have a blast (have fun)

Crocodile tears (fake tears)

Hit the nail on the head (your right)

Barking up the wrong tree (Talking to the wrong person)

It's raining cats and dogs (it's raining heavy)

We've got bigger fish to fry (there are bigger problems)

Break the ice (doing something to make each person feel comfortable)

By the skin of your teeth (just about)

Over the moon

Piece of cake

cool as a cucumber

hold your horses