Fat Worm of Error is an Experimental/Noise/conceptual art avant garde rock band from Northampton, Massachusetts. They are seen as staples of the underground noise and improvisation scene and helped to start what is known as a regional form of noise music called Western Mass Noise scene. They have been associated with the New Weird America genre. They utilize traditional rock instruments as well as homemade electronics and other modified instruments. In their live performances, the singer engages in homemade pageantry with homemade surrealist costumes. The band has toured Europe and North America.