An event when two couples receive phalacio while defecating in the bowl and in the tank.
"Yo Dawg, did you hear Shaniqua was in a Upper Decker Double Blumpkin' last night?'
by mrButters April 23, 2009
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When a man is taking a shit in the toilet tank while a female is sitting on the bowl reverse cowgirl taking a shit and sucking his dick then once they are finished they preform a reverse 69 licking each others assholes clean.
Dude last night i got a kentucky upper decker double blumpkin, and my ass has never been cleaner.
by tootalljen89 June 3, 2011
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Sexual act requiring 4 people. Person 1 sits backwards on the toilet while defecating and gives a blowjob to person 2, who is defecating in the tank of the toilet. Person 1 also gives hand jobs to persons 3 and 4, who are standing on either side of the toilet. Person 2, 3, and 4 high five above person 1's head.

The combination of the double blumpkin supreme, the upper decker, the pterodactyl, and the eiffel tower
Tom: Dude, I saw the nastiest thing, this chick was doing the "double blumpkin upper decker dactyl tower" at that party on Saturday night.
Ted: Wow she must be a freak!
Tom: Yeah, I almost puked!
by noey November 29, 2013
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The Act of creating two Blumpkin Pie's; then using said pies to create a sandwich for the woman to eat, while you prepare the coconut for the Coconut Surprise
Bro your sister is insane. I came home and found your brother performing The Double Blumpkin Pie Sandwich With A Coconut Surprise on her. I can't believe she just sat there and ate it! I was so excited when your dad walked in with the coconut.
by Xpenix99 June 12, 2020
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When a person is upper decking a toilet and another person is shitting backwards on said toilet giving oral sex to the person doing the upper decking.
The only reason I like house parties is pulling the old double reverse blumpkin before I leave.
by Coltnasty August 20, 2021
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the act of a male individual shitting or pooping in the upper deck of the toilet while a girl goes down on you (aka; sucking your penis), while she releases poop out of her butthole into the lower deck bowl of the toilet.
Jeff to Randy: Dude, bro, Jerry definitely just got some of that double decker blumpkin action dome piece from that random B with the STDs.
Randy to Jeff: Real nice, real fuckin' nice.
by Lambeaux + Jerry November 9, 2008
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A slight twist on the original blumpkin.

The double upper involves a male taking an upper decker while a female is taking a dump in the main bowl of the toilet while facing backwards. While all this is happening she is blowing him.
My buddy and his girl would have a few drinks after a night of eating hot wings. When they got home they were both so horny and had to shit so bad that it would inevitably turn into a double upper blumpkin.
by Captain_Jigly February 8, 2011
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