Animals
When you don't say anything.
Cat got your tongue?
When you wish good luck.
Break a leg!
Raining very hard
Raining cats and dogs
Two people work better together than one person.
Two heads are better than one!
When your not so young and energetic anymore.
No spring chicken?
To be distracted.
Head in the clouds!
To make a situation that cause trouble
Open a can of worms
To be two much emotional.
Lose your head!
To admit you were wrong about something
Eat crow