Green’s Dictionary of Slang

(US) pertaining to Mexican-Americans (esp. street gang members) or their culture.

1946		C. Himes ‘One More Way to Die’ in Coll. Stories (1990) 375: Some pachuco kids were ganged about the juke box, talking in Mex and blowing weed.
1967		F. Salas Tattoo the Wicked Cross (1981) 19: A small bony figure [...] slumped and hunched in a futile attempt at a pachuco slouch.
1974		(con. 1940s) E. Thompson Tattoo (1977) 3: His long blond pachuco pomp clogged with Wildroot Cream Oil.
1990		S. Morgan Homeboy 124: [He] was building a stratospheric pachook pomp that fairly begged for half a tube of Brylcreem.
2006		F.X. Toole Pound for Pound 50: Jailhouse pachuco tattoos.
2023		J. Ellroy Enchanters (con. 1962) 7: [A] bleak cat with a pachuco haircut.