three piece gun Share definition Flag A word that is used by the hommies to discribe the three pieces of a marshmellow gun. Dude did you see that three piece gun? Ya, he gotta be packing. Ya watch out he might shoot you right in the froat. three piece gun by killer kay May 28, 2009 0 0 Get merch Get the three piece gun mug. Buy Now — $32.95 See more merch
