D defs.my
Entry 2 senses Webster, 1913

motherfucker

· moth·er·fuck·er · IPA /mʌðɚˌfʌkɚ/
01 n. A person who is deemed to be worthless or despicable; -- obscene and highly offensive.
  1. 1.
    A person who is deemed to be worthless or despicable; -- obscene and highly offensive.[vulgar slang]
  2. 2.
    Any object viewed as annoying or frustrating; -- usually used as an expression of anger.[vulgar slang]