The phrase emerges in Post WWII America:
It’s hard to believe that that word as an epithet for a person is only about 60 years old. As we’ll talk about in a few minutes with Nunberg, the word emerges from the rubble, so to speak, of World War II, hangs around during the 1950s and ‘60s and then explodes in the lexicon in the 1970s.
And then the marvelous distinctions between profanity, obscenity, and vulgarity. The Slate conversation is able to delve into this in a way that mainstream journalism cannot because of our latent Puritanism I suppose. And is wonderfully funny.
At the above link there is both the mp3 version as well as the text.