nonconformist

One who does not conform to, or refuses to be bound by, accepted beliefs, customs, or practices.

Examples:

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

Available as a pinback button or fridge magnet in 1-1/4"