Poop a Moose Share definition Flag The act of pooping the day before a field trip when you are so exited that you can not hold your bowl movements. I can't wait for the field trip tomorrow. I'm going to poop a moose so im ready. Poop a Moose by iamthewalrus1993 May 15, 2007 0 0 Get merch Get the Poop a Moose mug. Buy Now — $32.95 See more merch