Fatability Share definition Flag The likelihood that a good lookin' girl will turn into a donut-lovin' jelly ass. Based on seeing the other females in her herd. Yo, Megan is fuckin' hot but she's got serious fatability. Fatability by tditty October 18, 2008 0 0 Get merch Get the Fatability mug. Buy Now — $32.95 See more merch