hepcats

/HH EH1 P K AE0 T S/
noun
  1. 1

    A jazz performer, especially one from the 1940s and 1950s.

  2. 2

    A person associated with the jazz subculture of the 1940s and 1950s; a hipster.

  3. 3

    A sophisticated person, one who is stylish.

Source: https://en.wiktionary.org/wiki/hepcat, https://en.wiktionary.org/wiki/hepcats