look up any word, like ratchet:
 
1.
Noun: A slang reference to one's butt, interchangeable with ass, arse, behind and bum.
I told my daughter to get off her petooty and clean her room.
by miaxara July 27, 2011
 
2.
The act of being mad at someone so much that they are at that moment, "On you're last petooty" or "Bugging the petooty out of you" or in some cases, just calling someone one. One with a large amount of petooty is basically on the top of the coolio chain.
"You're bugging the petooty out of me"
by Kyleob August 24, 2006