Money does not grow on trees.
Don't make that face or it'll freeze in that position.
If I talked to my mother like you talk to me ...
Always change your underwear; you never know when you'll have an accident.
What if everyone jumped off a cliff? Would you do it too?
You have enough dirt behind those ears to grow potatoes!
Close that door! Were you born in a barn?
If you can't say something nice, don't say anything at all.
Don't put that in your mouth; you don't know where it's been.
Be careful what you wish for - it might come true.