What does "alt ego" mean?
Native speaker’s answer
Rebecca
An “alter ego” is a person’s second self or personality. For many public figures, this might be a public personality versus private one. Wrestlers have “alter ego” that they adopt during matches, and even super heros in films and books have alter egos. Ex: Spider-Man is Peter Parker’s alter ego. Ex: Clark Kent switches into his Super Man alter ego when he fights bad guys.