(n.) A weapon created when an inmate models up a block of feces either from one sitting, or over many days and eventually carved into a stabbing weapon.
Once used the doodie shank will break off inside of the victim and generate a massive infection from the bacteria in the feces usually resulting in death.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi