Fucktastic Share definition Flag 1. Saying that something is 'fucking fantastic'. 2. Used in sarcasm. 1. Gosh that sex last night was fucktastic!! 2. She's not leaving? Oh thats just fucktastic! Fucktastic by Brade June 30, 2011 0 0 Get merch Get the Fucktastic mug. Buy Now — $32.95 See more merch