Similar to the Upper Decker, the Double Decker involves taking a shit in the victimâs toilet, not flushing, then repeating the process in the tank. The end result is the unsuspecting victim flushing the lone turd, only to be accosted by a stream of liquid feces into the bowl. This is far beyond an innocent prank, be sure the victim deserves it, as thereâs no going back.
Allen was house-sitting for Sam and had a party at his house...he was only caught because somebody left a Double Decker in Samâs toilet.