The brown rat (Rattus norvegicus). / (derogatory) A base and contemptible person. / Used other than figuratively or idiomatically: Any rat that lives in sewers.

A mixture of toxic and non-toxic gases produced and collected in sewage systems by the decomposition of organic household or industrial wastes.

plural of sewer rat

A type of moth; Ancylis nubeculana

(law) The intentional failure to provide service of process on a named party in a lawsuit, in order to prevent the party from having a chance to respond.

A form of socialism that prioritises provision of public services and infrastructure, primarily associated with Milwaukee.

(urban planning, derogatory) A place made unfriendly or dangerous to non-drivers by cars and car infrastructure.

plural of car sewer

Any of the family Psychodidae of true flies, sometimes found in plumbing drains and sewage systems.

plural of sewer fly