The precipitate produced by sewage treatment

Any thick, viscous matter

The Transformers is an American animated television series that originally aired from September 17, 1984, to November 11, 1987, in syndication based upon Hasbro's Transformers toy line.

A semi-liquid waste with a solid concentration in excess of 2500 parts per million, obtained from the purification of municipal sewage.

Sludge metal is an extreme subgenre of heavy metal music that combines elements of doom metal and hardcore punk.

Sludge is a fictional character in the Transformers franchise.

Sludge is a comic book series from Malibu Comics, set in the Ultraverse.

Sludge is a 2005 documentary film by Appalshop filmmaker Robert Salyer chronicling the Martin County Sludge Spill that was an accident that occurred after midnight on October 11, 2000, when a coal sludge impoundment in Martin County, Kentucky, broke through an underground mine below, propelling 306 million gallons of sludge down two tributaries of the Tug Fork River.

The Participatory Politics Foundation is a United States non-profit organization whose mission is to preserve U.S. democracy.

To slump or slouch.

To slop or drip slowly.