To take a shit in the top of the toilet, therefore when the toilet is flushed, brown water washes the poop down.
by chops renfer August 23, 2006
Get the upper deckermug. (Film Critique). When a movie starts out engaging and has great potential, but then the ending falls apart and the whole thing turns to shit. It's like finding an Upper Decker when you flush your toilet at the end of a party. It's there, and it's shit, you just don't know it yet.
by Britley's Grams September 04, 2016
Get the Upper Deckermug. by Russ151 October 20, 2006
Get the upper deckermug. When you have a massive deuce that must come out when your at a big party. You remove the top lid to the toilet, and release all the poo into it. When done, put the lid back on, and walk out like nothing happened.
I just put an upper decker in her toilet, HAHA!
There gonna be lookin for that upper decker for weeks,HAHA!
There gonna be lookin for that upper decker for weeks,HAHA!
by boiiiiiiiiiiiiiiiiiiiiiiiiiiiie April 08, 2006
Get the upper deckermug. A modification on the "classic" upper decker. In a public toilet setting (where there are no tanks/commodes), you improvise and shit in the urinal.
by David C July 20, 2008
Get the upper deckermug. Besides the common definition... A behemoth, often coiling, mass of stool that grows and grows until finally reaching above the water level of a toilet bowl. Known to be associated with binge eating. Kind of like one of those underwater volcanoes that breaks the ocean surface.
I had the munchies so bad all weekend, btw do you have a plunger I took an upper decker in your shitter and it's backed up.
by evangelicalathiest April 22, 2011
Get the upper deckermug. by Ann_Archy September 12, 2018
Get the Upper deckermug.