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To push a joke so far that it stops being funny, only to continue pushing 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.
Cumpkin by Darth Voorhees December 9, 2009
Related Words
A small square piece of cloth used by priviledged young men in Somerset to catch and clean-up semen.
"I took my cumpkin from my top pocket and proceeded to ejaculate into it, before discarding it out of the window"
cumpkin by jimbobfruitbat December 24, 2009
You make a jack-o-latern get at least 5 men to cum in that jack-o-latern and then get a women to put it on her head
Fred: Hey Bill wanna help me make a cumkin for my girlfriend
Bill: I'd love to man! I'll make the jack-o-lantern
cumkin by RHfan321 July 18, 2010

Tripple Decker A.C. Slater Crumpkin  

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 process of grabbing a man's cum mid-air. Can only be done after a cumshot.
"What the fuck dude quit cumping me and let me jizz in your mouth!"
Cumping by Flimpy Montgomery September 12, 2018

crumpkin 

Getting a blow job while doing crunches. That's motivation.
While doing some of his 3000 crunches a day, Rinaldo gets a crumpkin from Kim Kardashian.
crumpkin by dc43 July 19, 2010