Green’s Dictionary of Slang

sharp n.3

[sharp adj.]

1. (US black) fashionable clothing.

[US]L. Durst Jives of Dr. Hepcat (1989) 8: Sharps fronts and frantic threads will be on every hand, there will be free togs for everybody both woman and man.

2. (US) a second-hand car in excellent condition.

[US]Wentworth & Flexner DAS.