zanzy, adj. — Green’s Dictionary of Slang

zanzy adj.

[Zanzibar, a part of Africa and thus viewed positively]

(US black) attractive, first-rate.

a.1964		‘Sugar Hill’ in D. Wepman et al. Life (1976) 93: Dolores the Booster lived in style with her zanzy roommate Rose.
1964		R.S. Gold Jazz Lex. 351: zanzy, adj. [shortened form of Zanzibar, with whose predominantly Negro population many Negro jazzmen identify] [...] Authentic; splendid.