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!
The act performed by a caucasian who is driving while loudly listening to a tight hip-hop jam, but suddenly approaches a stop sign or red light. If the driver notices a black person within close proximity, he/she will attempt to subtly turn down the volume. This volume adjustment is done to avoid the uncomfortable feeling of the black person noticing that the driver is just another cracker trying to be down, but failing miserably.
Once James pulled up to an intersection and saw the potential for his cover to be blown, he started volume chumping to minimize his exposure.
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.