pachuco

noun2

1. •
   (US) A Mexican American, especially a juvenile delinquent in the Los Angeles area.

   • Now they saw that Terry was Mexican, a Pachuco wildcat; and that her boy was worse than that. — 1957
2. •
   An argot spoken by that group, sometimes known as caló.

   • Like the zoot suit, the Pachuco caló was adopted by a large part of the Chicano youth who did not, in essence, identify themselves as Pachucos. — 1974