I suspect the 1965 audience was expected to read-in a gender-based insult; but probably a mild one?
P.S. This one above appeared for an Arnold Zwicky analysis shortly after its GoComics reprint.
I was almost going to say the casual acceptance of violence is actually a bit shocking. But on second thought, Beetle’s reaction is not fully accepting. (Yes, we regularly see Sarge beating on Beetle, but that’s mostly about raising a ball of dust, while Rocky’s “blackjack” or “sap” strikes a more sinister air, something like underworld associations.)