Same as the standard upper decker except you eat a 20-pack of White Castles first and then take the massive dump in the tank. when the next poorslob flushes, the smell from the dirty water will cause an uncontrollable craving for White Castles.
When my ass was about to explode from that 20-pack of castles I ate, I gave marco's toilet a jersey upper decker.
It is a way of a guy saying he is going to have rawdonkulus intercourse with the opposite gender and not perform any dirty tricks such as a phantom or ice dragon. Its is derived from The Teenage Mutant Ninja Turtles(Kowabonga which is awesome) and the drill company Double Decker add it with the word collision(intercourse) and turtle wax(symbolizes wetness. words that are ordinary alone but together mean something totally different
guy1: Some fine as chick is looking for a supafly jimmy snooker. Anyone kno who she is?
guy2: Ask datchick if she wants a Double-Decker Kowabonga Turtle Wax Collision in her ass?