pachuco

1. (US, countable) A Mexican American, especially a juvenile delinquent in the Los Angeles area.Examples: "Now they saw that Terry was Mexican, a Pachuco wildcat; and that her boy was worse than that."; "I moved farther and farther into the Chicano community. I took Spanish in school and found willing tutors among my friends, who taught me a real-life version of the standard textbook language. I began to dress and comb my hair in the pachuco style of the day. I acquired the social customs and mannerisms of those around me."; "They asked him if he was a pachuco. He said all the pachucos he knew of lived in El Paso. He told em he didn’t know any Mexican pachucos."UScountable

2. (uncountable) An argot spoken by that group, sometimes known as caló.Examples: "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."uncountable