Slurry muffin Share definition Flag An australian substitutional word for slut. Not quite as harsh. jane: "did you hear susie's on her 5th boyfrind this month?"stephenie: "god, what a slurry muffin." Slurry muffin by Nykkole August 12, 2009 0 0 Get merch Get the Slurry muffin mug. Buy Now — $32.95 See more merch