a man is standng up while a woman sits on a toilet giving the man oral sex. she then starts squirting diarreah out her ass. As the male is about to cum, the woman sticks her hand in her ass and smacks the man in the face with diarreah unexpectedly.
I heard ashley gave thomas a gnarly dumpkin last night, it was so bad that he puked all over her face, and then gave her an angry pirate.
by dave miller November 28, 2006
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while taking a shit, doing a funnel. usually done with a close friend as the assistant
"yo derek i gotta shit, hold my beer?"
"fuck that grab the funnel it's dumpkin time!"
by oxcart December 24, 2008
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the act of performing oral sex on one's anus while that person is having a bowl movement. usually an act performed by a homosexual
Mike loves to give out free dumpkins to all the boys in his dorm!
by Matt Stokes Mitchell October 3, 2006
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A word made by some bros on the way back from Washington : The act of shitting on a toilette while a girl is also shitting on toilette facing each other and porking at the same time.
B-rad joe max and evan all got dumpkins
by a group of mofos from NH June 23, 2011
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(also spelled turdle dumpkin) a massive bowel movement resembling the shape of a turtle.
"Hurry up, Elroy! Brisco County Jr. is about to start!"

"Sorry, Mervin. I was pushing out a turtle dumpkin."
by B.M. Witherspoon Esq. August 12, 2017
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A generally overweight and slovenly unkempt person. Often saddled with an unfortunate odor of cheese and hopelessness.
Rachael: Wow, that new girl in accounting sure looks like a sloppy pumpkin with tits. Travis:. Yep, we've got another flumpety dumpkin to work with.
by Jason Forrester January 18, 2017
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Simultaneous oral sex performed by a male and female in the 69 postition, while both parters also defecate. This is a rare combination of the blumpkin and the cunnilumpkin.

Note: The homosexual male and female versions of the double dumpkin are properly refered to as the double blumpkin and the double cunnilumpkin, respectively.
Hey baby, I need to drop a duece too - lets do a double dumpkin!
by Mental Pickpocket October 30, 2004
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