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upper decker

Dude: im going to take an upper decker in burger kings toilet.

(Dude upper decks BK)
Later someone takes a piss and flushes toilet: what the!
by mountain high mush September 13, 2014
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Upper Decker

When a phish show is so bad, someone jumps from the top tier head first into the audience.
"Brah, are they playing gotta jiboo again? Gawd I'm gonna smoke some sourD then take an Upper Decker'
by MomoDanceSkunkPusky October 18, 2021
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upper decky gummy

Your gilf of a grandma is an upper decky gummy.
by raqueesha October 2, 2022
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Upper-decker Double Blumpkin

A dude sits atop the toilet tank and craps in it, facing forward. A woman (or man, I guess...) sits on the toilet backwards and also crals as s/he performs oral sex on the guy seated atop the tank.
What were you two doing in the bathroom so long?
I expelled every fluid imaginable thanks to getting an upper-decker double blumpkin.
by Terry O'Raynis April 4, 2023
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Upper decky

Yoo, remember that fucktard named jeffrey? I saw him putting in an upper decky in the bathroom
by dumdumboy March 12, 2024
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Upper Decker

When you take a huge dump into the water tank, hence the name upper decker.

Y'all have probably seen many more definitions and guides, but I'm gonna teach y'all how to do one even better.

1. Follow the typical steps to taking an upper decker and take all neccessary precaution to not get caught.

2. On top of shitting the most horrendous turd you can manage into the water tank, also dump in a significant quantity of high calorie food or drink (like bread, meat, highly sugary drinks, etc). This gives the microbes in the shit food to feed on, making the toilet even more nasty on top of the shit thats in there.

3. Profit
Man, that dude Jim was so mean last night. I can't wait to see the look on his face once he finds out about the Upper Decker Moldy Edition TM I did to his upstairs toilet
by PT118 May 4, 2024
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