Mississippi Chocolate

The act of having diarrhea into some else's mouth, forcing them to swallow it, and then having them vomit the diarrhea back into your anus.

Usually bestowed by drunken girlfriends riding upon the shoulders of their boyfriends at concerts while shouting "Wooooo!" with so much gusto that they momentarily lose the grip of their sphincter, releasing a torrent of the previous night's Taco Bell visit down the gentleman's back - much like a chocolate rooster tail.