To break ones will. To make one conform. Ass rape. To punk. The term "stump" represents the hieghth of the act taking place. To break someone over a stump and rape them. Hence the term broke.
When some bastard in the throes of bestiality trains a horse, mule, or any livestock animal into not walking away from a tree stump whenever he, ahem... "assumes the postion"...
if said bastard gets his freak on with said beast of "burden", and the animal has not tried to run off, it's stumpbroke.
"That skank-ass hoochiemama is just like a stumpbroke goat, she's spent her whole life backin up to somethin doggystyle"
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).