Green’s Dictionary of Slang

slave n.

1. (US campus) a college servant.

[US]E.H. Babbitt ‘College Words and Phrases’ in DN II:i 60: slave, n. A servant in a college.

2. (US black/campus) work, any form of job.

[US] ‘Jargon of the Und.’ in DN V 463: slave, A wage earner.
[US]Pittsburgh Courier (PA) 6 Aug. 11/1: [of a musical performance] We beat out a couple of slaves [...] one for the sepias and one for the grays.
[US]C. Himes ‘Let Me at the Enemy’ in Coll. Stories (1990) 41: I got a piece a slave in a pool room and figure I’m settin’ solid.
[US]L. Durst Jives of Dr. Hepcat (1989) 2: On the late bright after you have put down your easy slave you drape yourself in shape and tamp on the cuts where the cats are putting down much trash and everything is much solid.
[US]C. Brown Manchild in the Promised Land (1969) 192: Cats used to call it [i.e. work] a ‘slave’.
[US]G. Scott-Heron Vulture (1996) 108: All of them had been blessed with seventy-five-dollar-a-week slaves because they had their high-school diplomas.
[US]J.L. Gwaltney Drylongso xvii: slave – job.
W.D. Myers Dope Sick 27: ]J]ust another broke-sick fool begging for a slave.

In compounds

slave market (n.) (US)

cheap employment agencies, offering menial jobs for poor wages.

[US]N. Anderson Hobo 4–5: It is the slave market because here most of the employment agencies are located.
[US]‘Dean Stiff’ Milk and Honey Route 214: Slave market – That part of the main stem where jobs are sold.
[US](con. early 1930s) C. McKay Harlem Glory (1990) 66: Colored women used to gravitate to certain points in the Bronx and wait there for white matrons to come and hire them [...] the main point of congregation became notorious as the Bronx Slave Market.
[US] in S. Harris Hellhole 112: The Bronx, where the worst of the domestic ‘slave markets’ existed.
[US]J. Ellroy Blood on the Moon 108: ‘I hire these wetbacks from the slave market on Skid Row’.
[Can](con. 1920s) O.D. Brooks Legs 85: Scattered among these shops were the numerous employment agencies – called slave markets.

In phrases

collar Jim Slave (v.)

(US black) to perform a job.

[US]Archie Seale Man About Harlem 7 Dec. [synd. col.] The breakast dance [...] is just what the doctor ordered [...] if you have to collar Jim Slave the same day.