by IPeeFreely June 22, 2008

An incredibly beautiful swimsuit model. She graces the cover of Sports Illustrated's "Swimsuit Edition" for 2010.
by Gregory House, M.D. March 5, 2010

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

My ex left me because I wouldn't compost our trash... so I left her an ECO DECKER. That Prius was my composter.
by Eco Dexter December 29, 2009

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

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

by Steve Trizzle April 1, 2008
