macarthur
To poop in a urinal. Or the pile of poop left there. It's like the toilet's version of a snack bar.
"He did a MacArthur in the urinal like it was a competition.", @PoopDrama
"That MacArthur was so big, it had its own zip code.", @UrinalRider
"MacArthur is the reason why urinals have a lid now.", @PublicRestroom