Welcome to the Straight Dope, @Sodokufan!
And whaddya know, there’s actually a wiki page for these - uh - specialities:
Sounds like a niche that’s being monetized to me.
j
ETA: there’s a live thread:
- where I learned more about Sloppy Joes than I ever felt the need to know - looks like a loose meat sandwich and a Sloppy Joe are close relatives.