Puking on someone's genitals because he pushes your head down while you're giving him oral.
It tends to happen when drunk chicks with weak gag reflexes are man handled by guys who don't understand head etiquette.
"Oh man, he wouldn't stop pushing my face down so it was Dirty Jamaica all over again."
"It's when you get high with your girl, and your in a park somewhere doin' it, and there's dirt on the ground, and your down there, doin' (pussy licking noises) the thing, and you get a little dirt in there, IT'S THE JAMAICAN DIRT SANDWICH"
"Nah, the Jamaican Dirt Sandwich is bad because the grounds dirty right? And once you get a little dirt, it's not good."
"If I'm ever eating the Jamaican Dirt Sandwich in front of you, guaranteed one thing is for sure: We will both be VERY VERY DRUNK, and I wouldn't remember it"
n. software that is no longer sold or supported by the original publisher / developer, often found as free downloads on the internet because it cannot be obtained elsewhere. Not legal, but often seen as morally acceptable because the company that made it is no longer selling the title, nor releasing it as freeware, therefore abandonware is "keeping the gamealive", so to speak.
Doom II is not abandonware because idstill sells it, while The Incredible Machine is not sold, therefore is abandonware.
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).