stainus

anal leakage resulting in a shit stain on your pants, common among old bastards and sluts with loose back doors.

1:Dude you need to talk to your mom about that stainus. 2: I can smell that stainus from over here.

by Rocco Cocko III May 8, 2010

stainus

a stained anus, kinda browner than you think it should be...maybe even a dingle-berry or two present. Rhymes with anus.

Biff: Hey Blaine...that chick I banged last was awesome. But, when she bent over and pulled her panties off, I saw her stainus! It was rotten. But, I did her anyways.
Blaine: Did your tool smell like ass?

by saintsfanmd July 11, 2008

Stainus

A stained anus

I can't believe she had a stainus.

by Firetsunami June 11, 2021