Outsider by Green Day delves into themes of alienation, individuality, and nonconformity. The song captures the essence of feeling like an outcast in a conformist society and the struggle to maintain one's identity against societal pressures. Key moments in the song highlight the frustration of not fitting in and the resolve to stay true to oneself despite external judgments. The lyrics often emphasize the desire to break free from societal norms and embrace one's uniqueness.