Green’s Dictionary of Slang

meat market n.

[meat n. (1); in sense 1c below note synon. 1910s US meet market]

1. as a place, usu. for sexual encounters.

(a) (also market) a rendezvous for prostitutes of either sex.

[Aus]Dead Bird (Sydney) 30 Aug. 2/1: the meat market. In beef there was a great run upon legs, though buyers kicked rather hard at the shins. [...] Some dabblers in calves went a little above tho ankle, but we did not observe anybody knee-deep in them, and mutton is hooked up all over the city.
[UK]Farmer Vocabula Amatoria (1966) 43: Boucherie, f. A brothel; ‘a meat-market’.
[US]Goldin et al. DAUL 136/1: Market. The rendezvous of male oral sodomists and pederasts — with robbery and extortion as an indirect objective of youths frequenting these sections.
[US]Lavender Lex. n.p.: meat market:– A gathering place on a street or park where hustlers and prostitutes gather in search for a paying customer. Also the gathering place for amateurs in competition with the professionals. This is usually a fence or a wall where the individuals can pose to best display their qualifications.
[US]A. James America’s Homosexual Underground 30: A dark corner of the beach known as ‘the meat market.’ It is little more than an open air brothel.
[US]A. Vachss Hard Candy (1990) 6: The meat market. Whores working naked under clear plastic raincoats.

(b) (US) any situation or place where people are regarded as commodities, such as a recruiting agency or a modelling agency.

[US]A. Lomax Mister Jelly Roll (1952) 118: They gave us a hundred days on the county gang [...] When the inmates on the gang saw us, they hollered ‘New meat in the market!’ They jumped on us and took our money and cigarettes.

(c) anywhere that people gather for the primary purpose of finding sexual partners, often used in universities to describe first-year parties.

J. Osborne Entertainer 18: Every tart and pansy boy in the district are in that place [...] It’s just a meat-market .
see sense 1a above.
[US]J.P. Stanley ‘Homosexual Sl.’ in AS XLV:1/2 58: meat market n Street on which homosexuals gather, cruise, and pick up tricks.
[US]Eble Campus Sl. Mar. 4: meat market – place where members of the opposite sex are plentiful and available.
[UK]K. Lette Llama Parlour 172: Your best friend is baring all for one of the tackiest meat market magazines in the whole of the Western world.
[UK]I. Welsh Filth 145: Aw aye, I say, looking disdainfully around the meat market.
[SA]K. Cage Gayle 82/1: meat market n. place where gay men gather to find sex partners – usually bars, and steam baths.
[UK](con. 1980s) I. Welsh Skagboys 144: Everywhere else in Edinburgh is such a meat market.

(d) in fig. use, the world of commercial sexuality.

[UK]Oz 6 20/1: Girodias [is] the single most dedicated provider of sexual delicatessen for the Anglo-Saxon mental meat-market.

2. as a part of the body.

(a) the female breasts.

[UK]Partridge DSUE (1984) 730: C.19–20.

(b) the vagina.

[UK]Farmer & Henley Sl. and Its Analogues.