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.

by Lama March 8, 2003

upper decking

The process of taking a shit in the tank of a toilet instead of the bowl so when the next person flushes, all the shit goes into the bowl

Taking a shit in the tank instead of the toliet is upper decking.

by Jay December 27, 2003

Upper Decking

giving John Barrowman a blowjob on a transatlantic flight

"In the middle of the night ... on a 747 on the upper deck" (hence the term "upper decking")

by qwapos September 8, 2012

Upper Decking

Deficating in the tank of someone's toilet, rather than the bowl. Often employed in malicious context.

Suzy could not figure out why her toiled would flush only brown water. Little did she know that Johnny had upper decked that bitch the previous night.

by Korthos July 28, 2004

upper deck

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

I upper decked the shitter at Lincoln Station.

by Ben Johnson June 18, 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..

by Dave buttox May 5, 2004

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 20, 2004