disapproval If someone calls a person, usually a man, a motherfucker, they are insulting him in a very unpleasant way. a very offensive word for someone that you dislike very much or that you are very angry with. Do not use this word
[ 'm&-[th]&r ] (noun.) before 12th century. Middle English moder, from Old English mOdor; akin to Old High German muoter mother, Latin mater, Greek mEtEr, Sanskrit mAtr.