Have sexual intercourse with a woman until she's just about to climax. Pull out, and defacate vigorously on her and her sheets. Get off the bed and flip the mattress over with her underneath it, then jump back on top, bellowing loudly until you finish. Leave her to clean the room.

Works best following a greasy meal. Do not attempt in own residence.
After all that beer, rum, sausage, ice cream, and lobster, banging that ugly chick was a Mongolian Yak Crap waiting to happen.
by K. Khan January 30, 2009
Get the Mongolian Yak Crap mug.