I’ve actually been thinking about this recently, and it’s turned out to be pretty hard to pin down. I guess there are just different types of hippies (the jam band hippies, the ska hippies, the older generation hippies, the trippy hippies, etc., etc.). Apparently, I come home from college and become a hippie (vaguely ironic, seeing as people usually go to college and become hippies). I say that because I’ve been going to see jam bands play (moe., Phish, a Grateful Dead cover band called the Schwag), wearing tie dye and long, flowing skirts and such, smoking a lot of weed, spending more time outside, hanging around with dudes with dreads, etc., and, above all, enjoying it. I think the most telling feature is the attitude and general appearance.
And HEY – I do not have poor hygiene.