mum (pronounced "moom"; in IPA, [muːm]) is an experimental Icelandic musical group whose music is characterized by soft vocals, electronic glitch beats and effects, and a variety of traditional instruments.

The band was formed in 1997. Its original members were Gunnar Örn Tynes, Örvar Þóreyjarson Smárason, and twin sisters Gyða and Kristín Anna Valtýsdóttir. In 2002, Gyða left the band to return to her studies in Reykjavík. In early 2006, her sister Kristín also left the band, although it was not officially announced until November 23. [1]

According to founding member Kristín Valtýsdóttir, the band's name was not intended to mean anything. In an early interview, with the now defunct Icelandic paper Fókus, the name was explained as a picture. That is, the written letters "múm" are like two elephants, nodding their trunks.