Khalee,
In what is now part of Chinatown in lower Manhattan (it wasn't in those days) around the early decades of the last century, there was a dive of a joint called Sloppy Joe's. The sloppy Joe was apparently one of their main dishes. At least this is what Grandpa told me; I don't know if he actually ate there himself, but he was in the small restaurant biz.
Anyhow, I'd prefer a burger with all sorts of sloppy stuff on it than a regular sloppy Joe.