Q,

In your post when you say "here", I assume that you are talking about where you live in Canada, right?

Also, I think that you might be right about def coming from definitive, but I'm not definite about that.

LOL!

And I'm not trying to dis you, but I'm not sure about "dis" coming from "disparage". There's a lot of credible print material including Hip-Hop magazines which indicate that 'dis' came from "disrespect". And needless to say when you dis a person, you're disrespecting them. And yes, it's true that when you dis a person, you might be disparaging them. But you could also dis a person by igging them {ignoring them}.

And besides, that word "disparage" is kinda old school. I thought it meant "talk about a person bad" meaning "put a person down". I didn't even know about those other meanings you say disparage means.
Well, if I were a betting person {which I'm not}, I'd bet the farm {which I don't own} on "dis" coming from "disrespect" and not "disparage".

I'm just sayin....