To push a joke so far that it stops being funny, only to continuepushing it so that eventually becomes funny again. Functions as both a noun and a verb.
Richard: Why do you suppose that Peter Kay keeps repeating the same material on his live DVDs? It's as though he's incapable of writing fresh material, but such a thing cannot be!
Emma: Perhaps he's attempting to cultivate a cumpkin.
One of the most pleasureable, distgusting, and dangerous forms of vandalism. Smoking crack while simultaneously recieving head, and taking a shit in the top tank of a toilet. The female performing the oral sex is sitting on the bottom part of the toilete backwards, like A.C. Slater, taking a shit.
hey jeff how was that party? it was cool, but someone did a tripple decker a.c. slater crumpkin in my toilet and it smells like hagrid's butt in my house!