She's a Rebel by Green Day is a punk rock anthem celebrating the spirit of rebellion and individuality. The song lyrics portray a female character who embodies defiance and nonconformity, challenging societal norms with her bold and unapologetic demeanor. Key themes in the song include rebellion, empowerment, and individuality. Particularly poignant moments in the song include the descriptions of the 'rebel' character and how she stands out in her world, symbolizing a larger commentary on youth and resistance against societal expectations.