is a song released by English heavy metal band Black Sabbath.
It first appeared as the fourth track on the band's self-titled debut album.
In the early 1990s, Geezer Butler claimed that the title was a reference to drummer Bill Ward's beard at that time, which his bandmates felt looked like a pen nib.
When I wrote N.I.B., I couldn't think of a title for the song, so I just called it Nib, after Bill's beard.
2 on Billboard's Hot Mainstream Rock Tracks chart in October 2000.