Fluffing her muffin Share definition Flag 1) Slang term for female masturbation 2) To finger a girl 1) Emily was fluffing her muffin all night 2) I hear he fluffed her muffin Fluffing her muffin by ElliotM December 14, 2008 0 0 Get merch Get the Fluffing her muffin mug. Buy Now — $32.95 See more merch