MU330 (pronounced "em-you-three-thirty") are a ska/punk band formed in 1988 in Saint Louis, Missouri. The original members met in Saint Louis University High School music class 330 (hence the name of the band). MU330's lineup has changed frequently, but the foundations of the band remained intact — Potthast, Diebold, Bell, and Moll. The band is self-described as "psycho ska" and are known for their lively performances and a general ethic of fun and optimism. Their lyrics cover many topics, from racism to love songs to testicular cancer.