Green’s Dictionary of Slang

hang n.3

[SE hang, to hold on to]

(US black) a job, esp. one that may not be ideal but supports one’s living.

[US] in M. Daly Profile of Youth 235: A job is a ‘hang’.
[US] ‘Sl. of Watts’ in Current Sl. III:2.
[US]H.E. Roberts Third Ear n.p.: hang n. a job.
[US] ‘Black English’ in Reader’s Digest Success with Words 86/1: hang = ‘job, gig’.