Fuckboy Share definition Flag A guy who messes with a more than one girl in less than a month, usually messes with bestfriends. -He made out with me yesterday And now he's getting at my bestfriend -daam he a fuckboy Fuckboy by Urbanmessle August 31, 2016 0 0 Get merch Get the Fuckboy mug. Buy Now — $32.95 See more merch