When did you first hear 'dis?'

In My Humble Opinion
1

As in “disrespect,” or “dismiss.” I first heard in the Carl Weathers classic movie “Action Jackson” (1988), but I recently saw a Season 1 “Miami Vice” rerun, and Nougie used it in one ep. That would have been 1986. I came across an online source (probably etymonline.com) that attested it as far back as 1980.

Anyone any earlier (than my cites)?

2

Early 80s, maybe 82, 83? It was big in the early rap vocabulary (Doug E. Fresh, Mel E. Mel, Grandmaster Flash, et al.)