No problem. It may have been later when he used the term. I know he despised them because of their hair and music. In 1976, he changed his opinion of John Lennon though. He and I were lucky enough to meet Mr. Lennon and Yoko in New York. After talking with them for about 30 min (I did most of the talking), he said he might have been wrong about John. I think my dad was expecting a "drugged up hippie".
Below comes from Wikipedia:
Lexicographer Jesse Sheidlower, the principal American editor of the Oxford English Dictionary, argues that the terms hipster and hippie derive from the word hip, whose origins are unknown.[2] The term hipster was coined by Harry Gibson in 1940.[3] Although the word hippie made isolated appearances during the early 1960s, the first clearly contemporary use of the term appeared in print on September 5, 1965, in the article, "A New Haven for Beatniks", by San Francisco journalist Michael Fallon.