flapgina Share definition Flag The large fatty flap of skin that hangs down in front of a womens vagina. Usually found on women of obese nature. A good specimen can be found at you local dairy queen. Hey Jeremy is that your mom's stomach? No, thats her flapgina. flapgina by jimmy r November 26, 2005 0 0 Get merch Get the flapgina mug. Buy Now — $32.95 See more merch