"Mofo" is a song by Irish rock band U2. It is the third track on their 1997 album Pop and was released as the album's final single on 8 December 1997. The song was partially written about lead vocalist Bono's mother, who died when he was 14 years old. Other songs which Bono wrote about his mother include "Lemon", "I Will Follow", "Iris (Hold Me Close)" and "Tomorrow". Andrew Unterberger of Stylus Magazine considers the song to be "the only legitimate evidence" of U2's supposed dance-orientated direction on the album. He said the song was "Underworld-esque house frenzy."