Double Torpedo 

The act of two people simultaneously dropping loads into a toilet. The initiator, or the first mate as they are known, sits at the rear of the toilet seat spreading their legs as wide apart as possible. The second participant, or deck hand as they are known, squats over the top allowing both members of the Double Torpedo to “dump” at the same time. Extreme care must be taken when performing this bathroom stunt, accidents are common.

First mate: "Dude I really need to shit"
Deck Hand: "Me too man"
First mate: "Hows this going to work with only one toilet?"
Deck Hand: "Double Torpedo"
First Mate: "Best idea you've ever had"

Double Torpedo by Ginge the Baron October 28, 2008