When a man is taking a dump in the tank of a toilet while a female is sitting on the bowl taking a dump while facing him and performing oral sex on him.
Yo I was taking a shit and Tracy want to give me a blumpkin but she also had to take a shit so we did an Upper Decker Double Blumpkin
by Roger Podacter September 19, 2010
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The act of taking a Shit on the top cover of the tank of the toilet
Nick: Yo man i just took a Shit on Deans Toilet

RoseMarry: Yo you just Super Upper Decker Deluxe His Ass
by Dusty Dean July 28, 2010
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its where you turn off the water on the toilet before someone takes a poop and you take a diarrhea in the upper water chamber. Then when a person sits down to take a poo, it lands on the porcelain and sticks, then when they go to flush it shoots diarrhea out. causing a horrible situation
Man that was funny when billy gave her the old “Upper decker dry docker”, her trailer smelled like feces for months.
by jdunz July 20, 2022
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When you pack a fat lip of chewing tobacco in your upper lip and give a blow job. The tingle of the nicotine on the cock wrecks ur pecker, hence the upper decker pecker wrecker.
My girlfriend gave me an upper decker pecker wrecker the other day and I’m still buzzin.
by Maxregan6969 March 31, 2023
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The very intimate act in which the male lover delicately removes the top cover on the porcelain tank of a toilet. Next he will mount the the tank and begin to defecate. Now the female lover gently sits on the toilet seat facing her male partner. The act begins when she also compenses to defecate while orally accepting his genitalia.
I knew she was the ONE when she pulled me into the hotel bathroom and introduced me the amazing upper decker double blumpkin.
by INFDOC September 10, 2021
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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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It's the act of the man taking a dump in the tank of the toilet while the woman takes a dump in the bowl while giving the man a blowjob while a third party performs a golden shower.
Dude, last night Stacey and Dave and I did the upper decker double deluxe Blumpkin, it was gnarly!
by Reedski March 22, 2015
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