1. [1950s–60s] (US black) one who poses (with little or no success) as a hipster n.
2. [1950s–70s] (orig. US) a sophisticated, cool, ‘hip’ person.
3. [1960s+] (orig. US, also hippiehead) a (usu.) young person, preaching a philosophy of ‘love and peace’, backed by a wide spectrum of drug usage, esp. of cannabis and hallucinogens.