Move Over Busker by Paul McCartney is a lively song that narrates the experiences of a street performer or 'busker.' It highlights the struggles and perseverance of musicians who perform on the streets to make a living. The song touches on themes like resilience, the pursuit of dreams, and the often tough path to recognition and success. Key moments in the song reflect the tension between the busker's passion for music and the harsh realities of public performance. The phrase 'move over busker' can be seen as a metaphor for making way for new talent or a call for buskers to persist despite challenges.