"tip"= "leave" > "dip"= "leave" ?

[Kim & Rima McKinzey]

>...My question is:  Could the use of "tip" meaning to leave have
>been in use enough in NYC in the 1960's, possibly in the homosexual
>community, but the African-American Rap community picked it up and
>mangled it to "dip"?

I was in NYC until 1966 and never heard either word in the sense of
to leave.  On the other hand, I was neither in the homosexual
community nor the African-American community, though I had friends in
the latter.

Rima