The song "Marty McFly" by John C is about a guy who meets a girl at a party, but he doesn't remember her name. He describes how they had a great time together, dancing and partying all night long. He even takes her back to his place and they have a good time together. However, he wakes up the next morning with no memory of her name, and he can't find her anywhere. The title of the song comes from the movie "Back to the Future", where the character Marty McFly travels back in time to fix things that went wrong. The singer of the song wishes that he could also go back in time to relive the moment he met the girl at the party and find out her name. Overall, the song is about nostalgia, the desire to relive past experiences, and the regret of not having a complete memory of a significant moment in someone's life.
