mutherfucker Posted in M Best definition mutherfucker ghetto spelling of motherfucker. Cap the mutherfucker. mutherfucker: define #2 mutherfucker stupid bitches who want to fuck around Hello, I am a stupid mutherfucker! How satisfied are you with the definition? Looking for mutherfucker meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 38 times.