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"Dirty Day" is the ninth track on U2's 1993 album, Zooropa. It was co-written by Bono and The Edge.
It originates from the band recording "live" jam performances in the studio during the Zooropa sessions on the band's break in the Zoo TV Tour. The song was written about a character who leaves his family and returns years later to meet the son he abandoned. Many of the lyrics are taken from phrases that Bono's father, Bob Hewson, would use, including "I don't know you and you don't know the half of it" Read more on Last.fm.