1 definition by TNT- DOUG

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