mouthfuck verb 2noun 1forms 3 verb2 •(slang, vulgar) To aggressively and vigorously penetrate a mouth and throat; to practice irrumatio.Mouthfuck me, Andrew! — 2007 •(vulgar) To scold someone harshly. noun1 •(slang, vulgar) An act of aggressive, vigorous fellatio; irrumation. formsmouthfucked · mouthfucking · mouthfucks
