Green’s Dictionary of Slang

(US black) for a long time.

1944		D. Burley Orig. Hbk of Harlem Jive 16: That’s a gasser from back. [Ibid.] 19: These young studs are oilers from back.
1952		(con. 1948) G. Mandel Flee the Angry Strangers 244: He’s a junky from back.
1959		D. Burley Diggeth Thou? 40: The spielers were shucking some hard jive from back.