cum /kʌm/noun 4verb 2preposition 1adjective 1forms 6phrases 1 noun4 •(informal, vulgar) Semen.Jim descends into the murky tunnel; the faint odor of cum permeates the air. — 1977 •(informal, vulgar) Female ejaculatory discharge. •(informal, vulgar) An ejaculation. •Abbreviation of cubic metre.The density of cement is 1440 kg/cum. verb2 •(slang, vulgar) To have an orgasm, to feel the sensation of an orgasm.Despite claims to the contrary, a woman can cum from anal sex alone. •(slang, vulgar) To ejaculate.Some men cum as much as 10 milliliters. preposition1 •Used in indicating a thing or person which has two or more roles, functions, or natures, or which has changed from one to another.He is too good an actor to need that sort of tomfoolery: the effect will be far better if he is a credible mining camp elder-cum-publican. — 1926 adjective1 •Abbreviation of cumulative. formscummed · came · camed · come · cumming · cums Phrases with cum cum grano salisWith a grain of salt; with a bit of common sense and skepticism.