When did you first hear 'dis?'

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)?

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