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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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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