The song 'Punk' by Gorillaz is an energetic and rebellious track that delves into the themes of defiance and nonconformity. The lyrics reflect a punk rock attitude, embodying a sense of resistance against societal norms and expectations. The song can be seen as a critique of the status quo, encouraging listeners to break free from constraints and express their individuality. Key moments in the song include its fast-paced rhythm and assertive vocal delivery, which amplify its message of youthful rebellion and freedom.