fluff muffin Share definition Flag A big puffy Vagina with fluff covering it. Not too sexy. sophie pulled down her pants to reaveal a smelly fluff muffin which paul was glad to chomp on and find the cherry in the middle. fluff muffin by paullikesbuttsex June 28, 2006 0 0 Get merch Get the fluff muffin mug. Buy Now — $32.95 See more merch