Wikipedia
Siquitibum
The "Siquitibum" or "Chiquitibum" is a chant heard at Mexican sporting events. The Chiquitibum/Siquitibum cheer goes as follows: "Chiquitibum a la bim bom ba, chiquitiboom a la bim bom ba, a la bio, a la bao, a la bim bom ba, Mexico Mexico, Rah rah rah!!!" This most famous of Mexican cheers appeared at Mexican League and university soccer games during the late 1920s.