Shitty Jack Share definition Flag The act of jacking off while simultaneously taking a shit. Guy 1: "That guy's been in the stall for 20 minutes!" Guy 2: "He must be getting a Shitty Jack." Shitty Jack by boosac May 21, 2020 0 0 Get merch Get the Shitty Jack mug. Buy Now — $32.95 See more merch