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.
The proper term for gallbladder sludge is biliary sludge. It is a gelatinous bile that may be a precursor to cholesterol stones. However, in most cases, biliary sludge does not develop into a stone and dissolves within the gallbladder or may be passed out of the gallbladder.