tramp art = folk art

Creio serem termos que mais se aproximam do sentido original.
Characteristically folk art is not influenced by movements in academic or fine art circles, and, in many cases, folk art excludes works executed by professional artists and sold as "high art" or "fine art" to the society's art patrons.[1] On the other hand, many 18th and 19th century American folk art painters made their living by their work, including itinerant portrait painters, some of whom produced large bodies of work.[3]
Other terms that overlap with folk art are naïve art, Arts Primitive, Pop art, outsider art, traditional art, Tribal art, "tramp art", "self-taught" art and even "working class" art. As one might expect, all these terms have different connotations; but they are all at times used interchangeably with the term folk art, for which a satisfactory definition has proven hard to come by

Tramp Art
Tramp Art was a popular form of folk art that flourished in America from the 1870's to the 1940's. It took many forms, mostly functional but some purely aesthetic: its creators notched, layered, and whittled picture frames, elaborate boxes, and even full-sized furniture pieces. The most common materials for making tramp art were cigar boxes and wood from disassembled crates



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Note added at 1 hora (2012-10-16 17:50:50 GMT)
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O intuito deste tipo de arte, que data do século dezenove, não era a reciclagem, cujo conceito não existia na época, mas a pura escassez de material, principalmente na era da grande depressão dos EUA.