"Pachuco was what some Tex-Mexicans called gringos in the 60s here. I thought it was a bad word that meant whore. "
You got it backwards...back then Pachuco was a Mexican punk. It did not relate to good law abiding Mexicans.
Well, I had *one* Mexican in a HS class with me and he used the word all the time, about everybody.
He was Castilian of some kind (meaning I think he was actually from Spain, but we burbanites called him "Mexican"), but a mystery to us. Older than everyone, no visible means of support, no parents, his own apartment, quite handsome, not a greaser, dressed well.
I got the impression the word might mean "pimp" at the time, but someone else said it meant whore. Shows what I know! No one talked about stuff like that back then, except the guys who went to Boys Town in Matamoros.