Mussy Share definition Flag (noun,adjective)1.The act of being a Man-Gina. 2.Man-Whore. 3. Shoter term for Man Pussy. Adam is a GIGANTIC Mussy. Don't Be a Mussy, Eat it all. Mussy by CoCoMo July 30, 2003 0 0 Get merch Get the Mussy mug. Buy Now — $32.95 See more merch