In the art world, it is fostered by an incessant rain of numbers in the media whenever an art star comes to its attention. Graffiti Artists Turn on Banksy: The Rise of Art Hate Anthony Haden-Guest August 6, 2014
For the music genre, see Sludge metal. Sludge. Sludge is a semi-solid slurry and can be produced as sewage sludge from wastewater treatment processes or as a settled suspension obtained from conventional drinking water treatment and numerous other industrial processes.
slurry. 1  a thin mixture of an insoluble substance, as cement, clay, or coal, with a liquid, as water or oil. 2  Ceramics. a thin slip. 3  to prepare a suspension of (a solid in a liquid). 4  of or relating to such a suspension.