when giving a blumpy the reciever (or blumpeé) donkey punches the blumper (the giver). When they're out cold, the blumpeé turns around and takes a dump inside they're mouth. when the blumper wakes up it is fun to see how long it takes for them to realise what is in their mouth isn't what it was a few seconds ago.

NB: do not donkey punch while the penis is in their mouth beacuse getting knocked out forces you to bite down hard.
last night it took jane 30 seconds to realise she was giving des a reverse blumpy.

last night i didnt know i was giving a reverse blumpy cos it tasted the same.
by Des Walker September 25, 2006
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Basically a modified version of the blumpy.
A Princeton Blumpy is when someone (person A) performs oral sex on someone else (person B) who is having a bowel movement and there is someone (person C) who is getting "pooped" on (usually the face). However, half way through this act, person C will slowly move their face up to the sphincter of person B until they eventually reach the sphincter and then "cork it"(stopping the further flow of feces by blocking the sphincter with the tongue).

However, if the person's tongue can not hold the pressure of the flow of feces and they pull away their tongue, the fecal matter that escapes in this "explosion" is known as "The Koprek Kannon"
Steve: "So what did you, Amanda, and Reginald do last night?"
Roger: "Well, we tried out The Princeton Blumpy"
Steve:"oh...did the kannon happen?"
Roger:"Nope"
by shea April 29, 2004
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First the babay shits in the girl's pussy then as he is doing this the girl does an extroadanarily hard position to sock the little boys cock while it's crapping. Then they start rolling on the ground preferrably down a large hill.
:1st person:I Hot Alabama Alligator Baby Brother Blumpy Fuckhouse Pocket'd the shit outa that little baby yesterday.:2nd person:What.
:1st: Yeah Alligator Alabama Baby Brother Blumpkin Fuckhouse Pocket'd the shit outa that little kid.:2nd: Wtf is that? 1st Person: Well it's when (Recites defenition):2nd:I don't think we can see each other any more:1st: Your jealous.
by Justin Carter February 27, 2007
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The act of being bloated and chubby.
Wow, I am feeling extra BLUMPY right now after that whopping bowl of ice cream.
by DOPE AF TBH August 23, 2021
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a mix of 'blegh' and 'lumpy'
I was looking blumpy
by yeojin October 2, 2020
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