"Diamond Hoo Ha Man" is a song by British rock band Supergrass. The single was first played live at Guilfest 2007 in Guildford, England, and this live version was then released as a free download via the band's website. It is the first official single from the band's sixth album, Diamond Hoo Ha, and was released on 14 January 2008 as a vinyl-only single, limited to 1,500 copies, thus limiting its chances of charting, which it failed to do. An instrumental version of the song was recorded by Biff Hyman for the Duke Diamond and Friends: Glange Fever Motion Picture Soundtrack.

Supergrass are an English rock band formed in 1993 in Oxford. For the majority of the band's tenure, the line-up consisted of brothers Gaz and Rob Coombes (keyboards), Mick Quinn and Danny Goffey. Originally a three-piece, the band was officially joined by Rob Coombes in 2002.