The act of throwing a party or celebration for a friend who has just recieved a blumpkin.
"Dude, Matt just got a blumpkin and we are throwing a blumperation. Can you bring the chips?"
by Jolly Jose May 17, 2007
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When a male is sitting on the toilet, taking a dump and a girl is giving a blowjob at the same time.
When trailer trash whores having nothing else better to do than having sex with their nephews
by Ezekiel November 11, 2003
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A blumper is a girl who takes a shit while giving a blowjob at the same time.
She was constipated and killed two birds with one stone by becoming a blumper last night.
by Bizz Jizz August 4, 2018
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A way to say good-bye from chatrooms. May be confused as an invitation to do dirty sex act.
Amy: Bye everyone!
Tom: Blumper Amy!
Amy: Ok, when and where?
Tom: ...
by vj28.8 January 2, 2011
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A blowjob while on a bycicle, usually on a bicycle with two seats.
Me and Jessica Simpson were riding down the street on my bycicle ,and she grabbed my dick and gave me a blumper.
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Getting a blowjob while performing an upper decker
Did you here about slut last night giving him a blumper decker?
by Stevie Thunder April 25, 2009
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The combination of a blumpkin and an upper decker.
To defecate in the tank of one's toilet while receiving a blowjob.
i.e. To get mad domepiece while releasing the beast into the top of that Faggoty Ann's toilet.
Leopold: My asshole roommate fucked my mom last week, so I asked his mom to come over to 'see which of his clothes not to donate'. I broke out a decadent white zinf at the end, and one thing led to another... Next thing I know I'm getting him back with a blumper decker in his bathroom with his mom.

Lance: My stars, good play.
by Wlllford Brimley September 1, 2010
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