Hosta

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