Green’s Dictionary of Slang

(US black) to pay, to spend; to hand over.

1970		G. Cain Blueschild Baby 62: ‘[T]wo of em just stuck up the bar and when the cat didn’t get up off the bread fast enough, blew him away’.
1973		C. Himes ‘Baby Sister’ [screenplay] in Black on Black 70: Harlem is full of rich Johns who’d get off a C-note for her.