hippie

(1950s slang) A teenager who imitated the beatniks.

(1960s slang; still widely used in reference to that era) One who chooses not to conform to prevailing social norms: especially one who subscribes to values or actions such as acceptance or self-practice of recreational drug use, liberal or radical sexual mores, advocacy of communal living, strong pacifism or anti-war sentiment, etc.

(modern slang) A person who keeps an unkempt or sloppy appearance and has unusually long hair (for males), and is thus often stereotyped as a deadbeat.

Someone who dresses in a hippie style.

One who is hip.