upper decker

To take a crap in the tank of someone's toilet and not flush afterwards. When the next person flushes your crap comes rushing into the bowl all broken apart. A lot will clog in the top. This is mean.

It was my last day of work, and a friday to boot...so I left an upper-decker in the men's room.

by Anonymous April 10, 2003

upper decker

To take a crap in the top section of one's toilet so that when it is flushed, poo water flows back into the bowl.

Every a-hole deserves an upper decker!

by King Flump April 10, 2003

upper decker

The act of removing the upper lid to a home toilet. leaving an imense amount of defacation inside. the next customer will go and then flush your shit into the bowl, repeatedly.

while in ohio, the clarion hotel wouldnt give us a room because we werent 21, so ryan anson gave them an upper decker

by friend July 30, 2003

Upper Decker

When you take a crap in the tank of someones toilet instead of the bowl. Most often done to a sworn enemy or to your best friend.

I pinched one off in the upper deck. He'll have fun cleaning that out!

by Helvis September 16, 2003

upper - decker

When one takes a shit in the upper portion of the toilet. ( the tank ).

mike was really pissed that the land lord was evicting him. So he left him an upper - decker.

Jim wanted to get back at his best friend Steve for sleeping with his girlfriend, so he left him an upper - decker.

by TNT- DOUG September 27, 2006

upper decker

The act of removing the lid off the back part of a toilet and pooping in it. Poop comes in the bowl over time after flushes. Usually done at big parties that have gone wrong.

The host of that party was so horrible that Andre couldn't resist pulling an upper decker before we left.

by Agenda July 31, 2005

Upper Decker

When someone poops in the top part of a toilet, (the part that you have to take the top off) so when someone else goes to the bathroom and flushes the toilet instead of clean water coming in and filling the toilet, shit water comes in. This is done as a pratical joke, usually done at parties.

Guy 1:Hey I just did that Upper Decker in the toilet upstairs and Jennifer went in there.
Guy 2:Hahahah, what'd she do when she came out?
Guy 1:I don't know, she's still in there!

by Kevinnnnnnnnnn December 26, 2009