What is Cum Shit?
1.
That act of defecation after one has just received anal sex, resulting in a stool that is coated with semen.
Jane: Did paul fuck you in the arse-hole last night?
Wendy: Fuck yeah he did!
Jane: Did you do a cum shit afterwards?
Wendy: Yeah! It was the biggest cum shit you ever saw, I was all like "holy fuckballs, that cum shit is big!"
See