The upper deck

The act of defecation into the tank above someone else's toilet.

"Dude, Jill told me to leave, so before I went, I gave her the upper deck."

by Jason Spires April 19, 2004

upper deck

Where you go to someone's house, shit in the tank part of the toilet. the shit in there starts rotting, and starts smelling up the bathroom, and people don't know where the smell is coming from because they never look in the tank part of the toilet.

I took a crap in CJ's Top Tank and left him a Upper Deck he will never forget.

by William Wood August 9, 2005

upper deck

The act of excreating a log of fecal matter in upper deck tank of a toilet.
Usually as a prank or in desperate need if the toilet is plugged or dirty.

I took a shit in my friends upper deck and it stunk up the bathroom.

by Anthony April 16, 2004

upper deck

depositing your fecal matter in the tank of an adversary or foe.

That guy Jimmy threw a party last week. He tried to kick me out, so I upper decked his ass. Then I wiped some shit in his bedspread. I hate that jerk, but he straight got shitowned!

by Jake Fischer March 3, 2005

upper deck

to make doodoo in the water tank of a toilet

That guy richie is a real dickhead, so I gave him the upper deck the other night at his keg party.

by dirty sanchez July 14, 2002

upper deck

upper deck- its when u take a crap in the tank of the toilet. it works best in hotels lol..

ppl do this because it stinks really badly and usually the person tht u do it to, wont find out for a while

Sally, don't you dare leave an upper deck in your grandmas toilet.

by amaragallion89 November 21, 2009

Upper Deck

The Upper Deck is what happens when one lifts the lid off of the top of a toilet and proceeds to defecate directly into the tank

"Dude I totally just Upper Decked that asshole's toilet"

by Gobbledeeznuttz April 25, 2022