To receive fellatio while defecating.
When Hans had eaten too much Mexican food one evening, Olga had no choice but to give him a blumpkin.
by snikt April 27, 2008

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The act of simultaneously receiving oral sex and blowing your load while releasing feces.
Farcus put one more notch on his belt after last night when Wendy decided she would blow him on the shitter, little did she know his intent was to get a blumpkin.
by snagot September 08, 2007

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1. (blump-kyn)-noun
The act of a person performing oral sex to a man when he is pooping.
Alyssa Marie will give Randall Ryan a blumpkin.
by jibjabjibjab December 09, 2010

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when a girl gives you head while you're sitting on the toilet taking a shit.
Rosenberg:Hey Kumar i went to that asian party.
Kumar:Cool! What'd you do there
Rosenberg:I schupted Cindy Kim.
Kumar:Really?
Rosenberg:She gave me a blumpkin
by §nake January 13, 2010

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Getting a blow job while your taking a shit!
"This morning my girl gave me the blumpkin of my life"
by meloveuloooongtime July 31, 2009

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Its when a #A chick gives you head while your sittin' on the toilet takin' a shit!" -Harold and Kumar: escape from Guantánamo Bay.
Chick-" Hey you want a Blumpkin?"
Guy-" Whats a Blumpkin?"
Chick-" Ugh never mind"
Guy-"Damn!"
by NiXONs Bak July 28, 2009

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when a woman blows a man while he is pooping
"I walked in my house, and my roommate was getting a blumpkin."
by on vacation June 02, 2009

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