poop twin Share definition Flag A poop twin is when you and a friend always have to poop at the same time or around the same time Alana: I have to poop so badlyHayden: omg I just poopedAlana: poop twins!!! poop twin by nameable April 6, 2016 0 0 Get merch Get the poop twin mug. Buy Now — $32.95 See more merch