mthfckr Share definition Flag when you say motherfucker in a game and you dont want to get banned. Holy #### mthfckr hes hacking! mthfckr by QWRTYUIOPASDFGHJKLZXCVNMPOIUYT November 6, 2017 0 0 Get merch Get the mthfckr mug. Buy Now — $32.95 See more merch