Motherfucker is a vulgar, inappropriate word used to describe someone or something which is horrible, despicable or hated.
(noun)A person who sleeps with your spouse or who steals your money who you really, really hate is an example of someone you might consider a motherfucker.
See motherfucker in Webster's New World College Dictionary
noun
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See motherfucker in American Heritage Dictionary 4
noun
Related Forms: