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cocksucker

[kok-suhk-er]
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noun Slang: Vulgar.
  1. a person who performs fellatio.
  2. a mean or contemptible person.
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Origin of cocksucker

First recorded in 1890–95; cock1 + sucker
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Word Origin and History for cocksucker

n.

1890s, "one who does fellatio" (especially a male homosexual); 1920s as "contemptible person," American English, from cock (n.1) in phallic sense + sucker (n.). Used curiously for aggressively obnoxious men; the ancients would have recoiled at this failure to appreciate the difference between passive and active roles; Catullus, writing of his boss, employs the useful Latin insult irrumator, which means "someone who forces others to give him oral sex," hence "one who treats people with contempt."

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Online Etymology Dictionary, © 2010 Douglas Harper