Green’s Dictionary of Slang

(US black/teen) a job.

[1785		Grose Classical Dict. of the Vulgar Tongue n.p.: A yoke, the quantum of labour performed at one spell by husbandmen, the day’s work being divided in summer into three yokes. (Kentish term)].
1962		P. Crump Burn, Killer, Burn! 245: As for a job, I got de easiest yoke in de world.