|1.||Upper Decker Demolator|
The act of filling the top reservoir of someones toilet with liquid feces. Preferably, after the mass consumption of spicy foods such as vindaloo or chili.
Oh my god, an Upper Decker Demolator! I keep flushing and it keeps coming back!! Ok, you keep flushing, I'm going for more bleach. And some mints, in case you have to siphon it out...