upper deck 

v. The leaving of fecal matter in the tank of ones toilet, turning the water brown. Primarily done as revenge or a drunken practical joke, but sometimes in an emergency when the bowl is clogged.

n. The shit that is left in tank during such an act.

I got so wasted last night I upper decked Sean, his bathroom is going to stink for weeks.

upper deck by Lama March 8, 2003

upper deck 

When you drop a duece in the tank instead of the bowl.

I upper decked the shitter at Lincoln Station.

upper deck by Ben Johnson June 17, 2003

upper deck 

When you take the top off a toilet and shit in it so and replace it so when the next victim flushe's instead of becoming clean it fill's up with shit..

This dude pissed my off so I gave him the ol' upper deck..

upper deck by Dave buttox May 5, 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.

upper deck 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.

upper deck 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!

upper deck by Jake Fischer March 3, 2005

UPPER DECK 

takin the top off a toilet tank and shitting in it and placing the top back on the tank and walking away

i went to my friends house and used his bathroom and gave him an upper deck

UPPER DECK by DAVE AND CLARK May 8, 2008