Green’s Dictionary of Slang

(US black) sexy.

1918		A. Baer Tips on Golfing 21 Jan. [synd. col.] A year’s subscription to Jazzy Stories.
1924		(con. 1880–1924) F.J. Wilstach Anecdota erótica 41: As jazzy a jezebel / As ever did gyp a swell.
1926		Odum & Johnson Negro Workaday Songs 32: [song title] I Want a Jazzy Kiss.
1979		‘Iceberg Slim’ Airtight Willie and Me 13: We better blow some of the pressure in our balls into some jazzy fox.
1980		Afrika Bambaataa ‘Zulu Nation throwndown’ 🎵 It was a real jazzy lady, she was so fly.
2000		G. Pelecanos Shame the Devil 125: Had to talk to this jazzy girl I know.