hippie

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.

Someone who dresses in a hippie style.

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

A teenager who imitated the beatniks.

(no longer used, old-fashioned) Someone who is or tries to be hip.

Of or pertaining to hippies.

(informal, humorous) Not conforming to generally accepted standards.