beatnik, beat - a member of the beat generation; a nonconformist in dress and behavior

bohemian - a nonconformist writer or artist who lives an unconventional life

dissenter, dissident, objector, protester, contestant - a person who dissents from some established policy

enfant terrible - a person whose unconventional behavior embarrasses others

heretic - a person who holds unorthodox opinions in any field (not merely religion)

maverick, rebel - someone who exhibits great independence in thought and action

unorthodox - breaking with convention or tradition; "an unorthodox lifestyle"

disobedient - not obeying or complying with commands of those in authority; "disobedient children"