fuck ass Share definition Flag an annoying person, someone who has blurted out one of your secrets... like in the movie Donnie Darko "-Do you wanna tell Mom and Dad why you stopped taking you medication? -You're such a fuckass!" fuck ass by darkskies582 July 23, 2005 0 0 Get merch Get the fuck ass mug. Buy Now — $32.95 See more merch