upper decker

to leave a nice steaming terd on the toilet seat, enhancing the savory odor for the next user of the john; especially irritating to females, dudes not so much. Not to be confused with a Back Door Bandit which involves removing the lid of the reservoir tank and much better balance

eww, gross!!! some fuckwad left a upper decker in there!!!!! take me somewhere to tinkle, dammit!!

by coldbowl June 3, 2007

upper decker

When you take a dump in a toilets tank

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

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

upper decky gummy

attractive girl

Your gilf of a grandma is an upper decky gummy.

by raqueesha October 2, 2022

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

Upper Decker Lip Pillow

Common phrase for a nicotine pouch.

Yo bro, can I get an upper decker lip pillow.

by glitched0 August 10, 2023

Upper decky

slang for ZYN nicotine pouches.

Yoo, remember that fucktard named jeffrey? I saw him putting in an upper decky in the bathroom

by dumdumboy March 12, 2024