"Mein" (German for either "mine" or "my") is the second single from the American alternative metal band Deftones' fifth album, Saturday Night Wrist, and their 11th single overall. The song featured Serj Tankian of System of a Down on vocals. The single was released on March 13, 2007. It is also the band's last single recorded with their bassist Chi Cheng before his serious automobile crash in the following year and before his death in 2013.