Green’s Dictionary of Slang

haming n.

[haim n.]

(US black) working, having a non-criminal job.

[US]B. Jackson Get Your Ass in the Water (1974) 91: Judging from the way you dress and the things you own you must work at Carrol’s shipyard. / And knowin’ you like I do, I know you go these things by hamin’, / I’m willing to bet you got three, four jobs and spend your weekends lamin’.