and adjective used to describe anything that is able to exit your poop chute into the watery depths below.
by Pistol Petes July 11, 2008
Denise: Wow, Jackie seems so happy. She's all smiles even though David just broke up with her.
Cindy: Yeah, that's Jackie though, she is un-shittable-on.
Cindy: Yeah, that's Jackie though, she is un-shittable-on.
by Pudge Jefferson December 29, 2010