outsider art: any work of art produced by an untrained artist who is typically unconnected to the conventional art world—not by choice but by circumstance.
The characterization of the artists who create outsider art were socially or culturally marginal figures.
These people nevertheless produced—out of adversity and with no eye on fame or fortune—substantial high-quality artistic oeuvres.
These works are from musician activist and artist Tim Kerr.
These works are from street artist Brian "Bydeeman" Joseph.
For more information:
Extraordinary Interpretations : Florida's self-taught artists
The preference for the primitive
700.4145 GOMBRICH 2006
Drawing the city