shitnel

When you have an explosive shit that leaves residue on the inside and under seat of the toilet.

Dude 1 "Man I'm not usin' that basin, there's shitnel everywhere."
Dude 2 "Yeah, what went off in there?"

Shitnel

Short for shit shrapnel. When your explosive diarrhea fragments into shards and gets all over the inside of the toilet bowl, which requires thorough cleaning.

“As a result of eating too much Indian food, I blew up the toilet and got shitnel all over my ass cheeks”

Shitnel

Noun \shit-nul\

: Shrapnel that results from an explosive release of diarrhea. Usually plastered on the inside of a toilet bowl, but can be anywhere.

"I suppose I should get the toilet brush; there's a lot of shitnel in the shitter after taco night."