A humpytrumpydumpy happens during sex. It can happen to both men and women. It's when you are the one humping. You hump too hard that you end up farting. The combination of the humping and farting creates pressure in the back and ends up making u shit...
Guy 1: Hey! Heard you had sex last night! How'd it go man?
Guy 2: Badly.....
Guy 1: Oh god why?
Guy 2: Well...I got a little carried away and ended up doing a humpytrumpydumpy........
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.