Green’s Dictionary of Slang

(US) a jazz enthusiast.

1919		Eve. Public Ledger (Phila., PA) 24 June 11/7: The Brittons, ‘two jazzhounds’ [...] wind up a pleasant entertainment.
1921		Columbia Eve. Missourian (MO) 2 Dec. 1/1: Hundreds of jazzhounds, heedless of the heat, shook a swealtering shimmy to the sound of the saxophone sob.
1922		Mamie Smith & Her Jazz Hounds [song title] Got To Cool My Doggies Now.
1928		R. Carr Rampant Age 162: She was gazing at nothingness with that stunned look real jazz-hounds wear while dancing.
1987		H. Ward q. in R. Firestone Swing, Swing, Swing (1993) 129: ‘Singers were a necessary evil to Benny [...] Commercial music, you know. Benny was strictly the jazz hound. But he felt he had to have them.’.