A really big turd. Poop. Crap. Ish.
Mr. Mackey: "Let me assure there is nothing funny about going up to a nice clean - unsuspecting urinal, mmkay. Dropping your pants and then turning around... squatting over that urinal, mmkay... maybe - maybe pulling your buttcheeks apart with ur hands, mmkay. And then laying out a big fudge dragon for all the world to see."