> I literally never heard the term “Joint Tables” myself until now.

I don't think this is an SQL concept. The only people I've heard use this word (phrase?) are people who work with Java ORMs.

Also never heard of that phrase. I also haven't called them "join tables", but that at least seems a more sensible phrase and is a close homonym to "joint tables".

Ditto. And a Google search shows a full page of "table joins" for "joint table." Still not sure what a joint table is.