The Flint Michigan Fire Hydrant

When a girl is riding reverse cowgirl and pulls the man's knees up to her shoulders as he violently spews laxative induced volcanic diarrhea across the room. Commonly announced in conversation as the abbreviation, F.M.F.H.

Hey babe, since the owner of this Airbnb was being such a lying jerk, wanna do the F.M.F.H.(The Flint Michigan Fire Hydrant) on the kitchen counter before we leave?