The song "Allons en fan" by Pascal Obispo is about a love for rock music and rebellion against societal norms. The lyrics describe a longing for freedom and a disregard for the opinions of others. The singer expresses a deep connection to rock music and its culture, mentioning iconic figures such as Elvis Presley, The Clash, and Marquis de Sade. The song also touches on the passing of time and the influence of rock music on the singer's life and his relationship with his son. Overall, the song conveys a sense of defiance and passion for music, embodying the rebellious spirit often associated with rock and roll.