The closest equivalent is "my man".
Used in the Caribbean zone both in Venezuela and Colombia -and some other places though I
don't know which ones for sure. It comes from "Vale", a brand of padlocks. When some guys were very close
friends, people used to say they were "Vale cerrado", meaning like a tightly closed padlock.
Later it became just "vale". Often styled as "
mi vale"/"vale mía" (my buddy) or "valecita" (little buddy). It is also used as "el vale..." to colloquially address or refer to any young male.