"N.I.B." is a song released by the British heavy metal band Black Sabbath. It first appeared as the fourth track on the band's 1970 debut album, Black Sabbath. The lyrics are in the first person from the point of view of Lucifer. Lyricist Geezer Butler has said that "the song was about the devil falling in love and totally changing, becoming a good person.""N.I.B." begins with a bass solo by Geezer Butler, titled "Bassically" on some US releases.