Poo Pen Share definition Flag Opposite of a ghost poo, when you keep wiping and poo is still there. The poo is like ink. Poo Pen, Sam - Dude I went for a shit and I had poo pen and I couldn't stop wiping.Alex - Just use a baby wipe -you animal. Poo Pen by Amm2195 September 26, 2020 0 0 Get merch Get the Poo Pen mug. Buy Now — $32.95 See more merch