Both this article and the character(s) documented in it contain language that may be considered offensive to some users.
Shit-Ass, or Poopy Butt, is a character who appeared in Jeffy's Dog! as Jeffy's new pet to replace Melvin (Pee Pee Suck II) for getting lost during hide and seek. Shitass is known to poop and he was also confirmed to be paralyzed and Rosalina chose him so he won't run away from Jeffy.
He got his name from Jeffy's tendancy to give his pets vulgar names. However, in Jeffy's Pokemon Card!, he's called Poopy Butt due to Youtube's Community Guidelines. Made by Evelinka from Beacon Art Studios (Eva Gronowitz)