The streaks left on the inside of the toilet bowl after a massive bowel movement, particularly those left after the toilet has been flushed.
“Dude I flushed twice and there’s still shit on the inside of the toilet.”
“That’s the Devil’s Graffiti, baby.”
The streaks left on the sides of the toilet bowl after an explosive bowel movement, particularly after the first flush.
Them: I’ve already flushed twice and there’s still shit stuck on the toilet
Me: That’s the Devil’s Graffiti, baby. You can’t deface what’s already been defaced.