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.
by Anonymous April 10, 2003
Get the upper decker mug.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.
by King Flump April 10, 2003
Get the upper decker mug.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
Get the upper decker mug.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.
by Helvis September 16, 2003
Get the Upper Decker mug.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.
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
Get the upper - decker mug.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
Get the upper decker mug.When a man is taking a dump in the tank of a toilet while a female is sitting on the bowl taking a dump while facing him and performing oral sex on him.
Yo I was taking a shit and Tracy want to give me a blumpkin but she also had to take a shit so we did an Upper Decker Double Blumpkin
by Roger Podacter September 19, 2010
Get the Upper Decker Double Blumpkin mug.