Top definition
The act of sitting on the top part of a toilet and shitting while getting head by the girl who is strattling towards you on the bottom seat while also taking a dump at the same time.
The raunchiest act of the famous "blumpkin" to the next extreme calling it the Upper Decker Double Blumpkin.
by Dante Rau July 20, 2006
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May 15 Word of the Day
A few weeks ago, no one had “cheugy” in their vocabulary . Now everything is saturated with the word. It’s in our heads. It’s in our homes. Everyone is asking: “Am I cheugy? Am I a basic ass bitch? Am I GUILTY of being cheugy?”

The proliferation of cheugy in the mainstream discourse can only be attributed to one source: mental terror. It’s an orchestrated psychological trap to make you question your tastes and interests in the eyes of others.

You are not a cheug. YOU’RE PERFECT!!!!

It is very suspicious that the cheugy mascot is a Minion, a literal cyclops, a deformed
yellow panopticon in overalls ... do not let the all-seeing eye to control you. Be vigilant. Resist cheugy psyops.
Becca is another victim of cheugy psyops. I saw the garbage truck take all her Ugg boots yesterday. She even removed “I LOVE The Office!” from all her dating profiles. She’s unrecognizable.
by Callmemaybe69 May 12, 2021
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2
A man takes the upper-back of the toilet off and sits on it. A woman gives him a blowjob as he takes a crap in the back of the toilet. After crapping and the blow job is done, he puts the lid back on the toilet.

An unsuspecting person comes in later and uses the toilette. When they flush the toilet it fills with brown water from the crap the man took in the upper deck.
“I was over Al’s house and I upperdecker double blumpkin’d his toilet. That thing was flowing brown all day”
by Stephen Roche September 21, 2019
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3
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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4
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 22, 2009
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