Hollywood came up with that term in the 1930s. The most common word actually used back then was "gunhand." "Shootist," "pistolier," and occasionally "pistolero" were also used, but less common.
The word "gunslinger" is bullshit, just like so many other things that come from Hollywood.
Friend: "Dude, what's this old black and white cowboy picture?"
Me: "That's my Great-Grandfather when he and his older brothers had to ride with a posse going after a serial rapist in southwest Arizona in 1916."
Friend: "Your gramps was a gunslinger? Cool! He must have shot all kinds of fools!"
Me: "Nobody said gunslinger back then, fuckstick, they were called gunhands. And no, Great-Grandpa wasn't a gunhand just because he knew how to shoot. He wasn't a bounty hunter or anything like that. They went to apprehend the fucker, not just kill him outright. They caught him and brought him back. He stood trial, was convicted, and they hanged his ass."
A small town that stretches on the edges of both Macedon, NY and Walworth, NY. Its main attraction is a corn field. It also consists of an Elementary, middle and high school. Those are considered semi-private based on school taxes and class sizes.
Guy 1: We live in Gananda, yo. Homeshizzle.
Guy 2: Dude, your town is surrounded pretty much by corn...you're not a gangster.
1. An original type, form, or instance serving as a basis or standard for later stages.
2. An original, full-scale, and usually working model of a new product or new version of an existing product.
3. An early, typical example.
4. Biology. A form or species that serves as an original type or example.