A maverick is a person who does not conform to the norms of society. The term is often used to describe someone who is independent and non-conformist. Two famous mavericks are BART and BRET, both of whom have four letters in their names. BART is the protagonist of the popular animated television series 'The Simpsons', while BRET is a professional wrestler and actor. Both of these individuals have made a name for themselves by being independent and refusing to follow the status quo.