Sludge is a semi-solid slurry produced from industrial processes.
Sludge may also refer to: Sewage sludge Mining sludge Biliary sludge Oil sludge, a solid or gel in motor oil caused by the oil gelling or solidifying Sludge metal, a fusion genre between doom metal and hardcore punk Sludge content, a split video format Sludge (comics), an Ultraverse comic book Sludge (film), a 2005 documentary film by Appalshop filmmaker Robert Salyer SLUDGE syndrome, a medical acronym describing the symptoms of overdose or poisoning of certain drugs and pesticides Sludge (news), an investigative journalism news outlet covering lobbying and money in politics Sludge theory, an economic behavioral theory
See also Slurry