When a black male inserts his penis into the asshole of another person who has recently pooped, and not cleaned the asshole, leaving residue of feces on the inside of the asshole, and on the penis of the nigga.
John: How was your sex session last night?
Nisaiah: Messy, I had a Nigga Shit Fuck with my girl.
When you fail at something in life (eg. failing an exam or not getting a job), go home and spend an hour just standing in the shower, propping yourself up against the wall with your eyes on your feet.
Caleb knew the only thing to do after he didnt get prefect was take a failure shower.