Green’s Dictionary of Slang

(US black) one who barely manages as a pimp and has no hope of transcending that level of employment within the criminal hierarchy.

1972		Milner & Milner Black Players 33: A simple pimp is one who is not successful, a loser who will never rise above day-to-day survival.
1977		J.L. Dillard Lex. Black Eng. 87: A less-effective player, who barely subsists on procuring, is called a simple pimp.