hepcat

noun3

1. •
   (informal) A jazz performer, especially one from the 1940s and 1950s.
2. •
   (informal, old-fashioned) A person associated with the jazz subculture of the 1940s and 1950s.

   • 'Most of the real hep-cats smoke reefers,' explained Leiter. 'Wouldn't be allowed most places.' — 1954
3. •
   (informal, old-fashioned) A sophisticated person, one who is stylish.