A bizarre, grey substance found on shoes and the bottoms of pants after a frat party. It is sticky and repulsive, as well as exceedingly difficult to clean. Everyone always has their own definitive theory of what it actually is and how it gets on everyone.

when you're hungover as shit after a spending a night drunk as a skunk

The miscellaneous unknown substances that you find inside frat houses. Said substances are often composed of beer, vomit, blood, food, piss, and anything else mixed together. Often found on the walls, the floor, under the stairs, or really anywhere imaginable.