Green’s Dictionary of Slang

(US black) well-turned-out, elegant.

1943		Chicago Trib. Graphic Section 26 Dec. 7/1: Jive Talk [...] Synyms for Smooth. Plenty potent. Mellow. [...] Righteous. Sharp. King size. Neat. Super-solid. On the buttered size. Home cooked. Feally rugged. Cooking with gas. Singing in G. Strictly barbecued. Hot stuff. Hep to the jive. Alreet. Snazzy. Plenty on the ball.
1983		R. Klein Jailhouse Jargon and Street Sl. [unpub. ms.].