Pot/coke/crack/meth/dope etc. Head
Hop Head (as in beer; hops)
Rubber Head (mountain biker)
Lead Head (NASCAR, presumably "lead foot" idk)
and so on (I've heard all of these relatively regularly)
A "hippie" is a mythical creation from culture, not unlike cowboys and vikings and benevolent politicians. Although, when accused of being a hippie, I usually agree and quote a bumper sticker my friend had on his guitar case:
"Happy Intelligent Person Pursuing Infinite Enlightenment"