The remnants after having explosive diarrhea.
After a long night of drinking, Jeanie couldn't control her bowels and there was butt shrapnel all over the walls the next day!
by Cropdustingtheworld February 27, 2011
1 more definition
The remnants of poo that are missed in the wiping process. These remnants are free to flake off or stick around.
Oh no! I guess I wasn't thorough in my wiping job considering that I have a nasty case of butt shrapnel
by Lewis Hemingway May 26, 2010