The song "Mount Everest" by Labrinth is about overcoming obstacles and becoming successful. It expresses the idea that no matter the hurdles in life, one can still rise to the top and be the best version of themselves. The lyrics emphasize that hard work and dedication can help an individual achieve their goals, no matter the competition they might face. The song also serves as a reminder to stay confident and be proud of yourself, as well as to never give up.