cum

Etymology 1

Learned borrowing from Latin cum (“with”).

prep

1. Used in indicating a thing with two roles, functions, or natures, or a thing that has changed from one to another.
   He built a bus-cum-greenhouse that made a bold statement, but the plants in it didn't live very long.
   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. 1926-1950, George Bernard Shaw, Collected Letters: 1926-1950, University of California/Viking, published 1985, page 31
   The banner shows a yellowed silhouette of a boy (possibly Calvin, of Calvin & Hobbes) urinating on an EU flag. Sites such as this show the full power of the Internet as a propaganda medium cum travel service cum organizing tool. Oh, and nightlife directory. 2001 Nov/Dec, David Sachs, “LET THEM EAT BITS”, in American Spectator, volume 34, number 8, page 78

conj

1. Used in indicating a thing or person with two or more roles, functions, or natures, or a thing that has changed from one to another.
   But instead of being a salesperson cum barista cum waitress merely serving the wordsmiths, I'm one of them, reading her latest baby out loud.
   One driver-cum-fireman-cum-fitter looks after the three locomotives, …. 1944 May and June, “Notes and News: The Snailbeach District Railway”, in Railway Magazine, page 183
   Coffee shops-cum-meeting-spots dotted across the city are teeming (Equator, Blue Bottle and Saint Frank). Caffeine-fuelled, lactose-intolerant, macadamia milk latte-drinking young folk are journalling, manifesting, coding, ChatGPT-ing and pitching their ideas. 2023-02-05, Kathryn Parsons, “Boom times are back in San Francisco’s tech mecca”, in The Sunday Times

Etymology 2

Variant of come, attested (in the basic sense "come, move from further to nearer, arrive") since Old English. In the current sense and spelling from 1970s.

noun

1. (colloquial, vulgar) Semen.
   Jim descends into the murky tunnel; the faint odor of cum permeates the air. 1977, John Rechy, The Sexual Outlaw, New York: Dell, page 73
2. (colloquial, vulgar) Female ejaculatory discharge.
3. (colloquial, vulgar) An ejaculation.

verb

1. (slang, vulgar) To have an orgasm, to feel the sensation of an orgasm.
2. (slang, vulgar) To ejaculate.
   I got no sensation down there, so I don't know when I'm hard, I don't know when I cum. My wife's gotta tell me. 1997-07-14, “Visits, Conjugal, and Otherwise”, in Oz, season 1, episode 2, spoken by Augustus Hill (Harold Perrineau)
   Sucking on pork ribs and summoning pornography / So that we can cum when we fuck / Our partners don’t know us / Our families are strangers 2019, “All Humans Too Late”, in The Book of Traps and Lessons, performed by Kae Tempest
3. Eye dialect spelling of come (“move from further to nearer; arrive”).
   “Where'd he cum from?” the bowman inquired. “That's what we'd like ter know, yer see; where he cum from, and how he happen'd to cum,” responded the steersman. “But he's a jolly good feller, strong as a lion, […]” 1882, William Makepeace Thayer, From Log-Cabin to White House, page 162

Etymology 3

adj

1. Clipping of cumulative.

Etymology 4

noun

1. Abbreviation of cubic metre.
   The density of cement is 1440 kg/cum.