upper decker

the act of deficating in the water tank of someones restroom, so when they flush, out comes muddy madness

i just left an upper decker in that starbucks bathroom!

by darby krow February 13, 2010

Upper Decker

When you go in the TOP tank of the toilet. Best used at a party or with an audience.

Aw, man! Someone pulled an upper decker!

by Goldgoatturd February 20, 2009

upper decker

take a shit in the top of someones toilet (where all the toilet guts are)

Valerie was so drunk she did an upper decker in her friends toilet at the party, and everyone smelt it.

by valere March 13, 2008

upper decker

A long home run ball hit into the upper seats of a baseball stadium.

After I caught an upper decker at Busch Stadium, I went to Dan's house where I left a beefy sewer pickle in the tank of his toilet.

by porknut September 4, 2005

upper decker

To take a shit in the top of the toilet, therefore when the toilet is flushed, brown water washes the poop down.

"That fuckin bitch wouldn't blow me so I am going to leave her an upper decker"

by chops renfer August 23, 2006

Upper Decker

(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.

The movie Enemy (2013) was a real Upper Decker.

by Britley's Grams September 4, 2016

upper decker

the act of pooping, in th top resiviour part some someone elses toilet.

I just gave Bills toilet an upper decker.

by Russ151 October 20, 2006