Zip-a-dee-doo-dah
Example:
Alice: Oh they make me so mad! They think they can be mean to me just because I'm smaller than they are!
Caterpillar: Zip-a-dee-doo-dah.
Alice: Oh they make me so mad! They think they can be mean to me just because I'm smaller than they are!
Caterpillar: Zip-a-dee-doo-dah.