2piece Share definition Flag when you analy fuck a women and just before you cum in her ass you punch or slap her ass. (inspired by the move from GoW 2) guy 1- ah, dude i 2pieced my girl last night in bed. guy 2- that's fucking legit. 2piece by IXKnightmareXI July 8, 2009 0 0 Get merch Get the 2piece mug. Buy Now — $32.95 See more merch