mouthfuck

mouth +‎ fuck.

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mouthfuck (plural mouthfucks)

1. (vulgar, slang) An act of aggressive, vigorous fellatio; irrumation.

mouthfuck (third-person singular simple present mouthfucks, present participle mouthfucking, simple past and past participle mouthfucked)

1. (vulgar, slang) To aggressively and vigorously penetrate a mouth and throat; to practice irrumatio.
   • 2007, Peter Jason, Unfaithful, page 62:

     Mouthfuck me, Andrew!

   • 2007, Tom Dalzell, Terry Victor, Sex Slang, page 119:

     ...mouthfuck...

   • 2011, David Hawthorn, My Daughter, My Desire: A Novella of Forbidden Lust, link:

     I started to mouthfuck my daughter hard, making cum squirt out of her tightly stretched lips.

2. (vulgar) To scold someone harshly.

• mouthfucker

• Random House Historical Dictionary of American Slang