# sewer rat

> English word · Noun

## Definitions
1. The brown rat (Rattus norvegicus).
2. A contemptible person.
3. Used other than figuratively or idiomatically: Any rat that lives in sewers.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/sewer-rat