Douglas Harper's Etymology Dictionary
Wikipedia
Art Brut are a Berlin-based English and German indie rock band. Their debut album, Bang Bang Rock & Roll, was released on 30 May 2005, with its follow up, It's a Bit Complicated, released on 25 June 2007. Named after French painter Jean Dubuffet's definition of outsider art - art by prisoners, loners, the mentally ill, and other marginalized people, and made without thought to imitation or presentation - South London's Art Brut were tagged by NME as part of the "Art Wave" scene that also included bands such as The Rakes, Franz Ferdinand and Bloc Party.
Usage examples of "art brut".
MacGregor is the author of the 1988 The Discovery of the Art of the Insane, a seminal study of one manifestation of the form that has been variously called Art Brut, Folk Art, Self-Taught Art, Visionary Art, but which is now commonly classed under the catchall term Outsider Art.