In the TV show "From dusk till dawn", many (every?) Mexican characters call a Texas Ranger "pinche rinche", or sometime simply "rinche". I guess from the context that it's some low-key insult.
I understand "pinche" as, in this context, an offensive word, but I don't understand "rinche". Some dictionaries translate it like "corner" (which doesn't seem to make any sense), some others don't list the word at all (which seems to indicate it's slang).
I don't know if it's relevant, but everyone using this term in the show is a criminal tied to a very specific cartel (which doesn't exist in real life - it's a vampire's cartel).
Is it a word that is really used to designate a Ranger (or maybe a cop)? Or is it a term specially invented for this show?