Green’s Dictionary of Slang

(US black) difficult, problematical, unpleasant.

1969		‘Iceberg Slim’ Mama Black Widow 51: Ah ain’t takin’ yur jinky talk serious.
1980		Jackson & Christian Death Row 56: They call different people ‘jinkie,’ you know. Homosexuals are jinkies. Certain people been busted a lot of times, they’re jinkie – you know, bad luck. Voodoo and what not.