Shitty ballsack
this happens when said ballsack is covered in poo from things only you know about
Person 1: So im balls deep in this guys ass right and then all of a sudden my balls are covered in fecal matter.
Person 2: Wow, you have a shitty ballsack
Person 2: Wow, you have a shitty ballsack
Ballsack Shitty
The act of wiping one's ass too hard, slipping and smearing feces on the grundle and crown jewels.
"I was being rushed out of the bathroom whilst wiping my behind and got a bad case of ballsack shitty."