musty pooter Share definition Flag A vagina that is stale or moldy in odor or taste. Hackneyed or trite; dull. Out of date; antiquated. Ew ya nasty you got yourself a musty pooter. musty pooter by peniledysfunction March 3, 2011 0 0 Get merch Get the musty pooter mug. Buy Now — $32.95 See more merch