D defs.my
Entry 2 senses Webster, 1913

cocksucker

· cock·suck·er · IPA /kˈɑksˌʌkər/
01 n. a worthless or despicable person; -- intended as disparaging and invariably offensive.
  1. 1.
    a worthless or despicable person; -- intended as disparaging and invariably offensive.[vulgar slang]
  2. 2.
    a person who performs fellatio.