Green’s Dictionary of Slang

splib adj.

[splib n. (1)]

(US black) black.

1970
197019751980
1985
[US]A. Young Snakes (1971) 63: These old splib cops, they think they slick.
[US]G. Tate ‘Atomic Dog’ in Flyboy in the Buttermilk (1992) 29: All the slick splib hustlers that ran the streets of Plainfield.