Definition of swamp rat in English:

swamp rat

noun

  • An African rodent that frequents dense vegetation on swampy ground.

    Three genera in the family Muridae, in particular the vole-like Otomys (also called vlei rat) and the slender Malacomys: several species

    • ‘Let us now address the swamp rat, which goes by the name of Nutria.’
    • ‘A rat is a rat, unless it's a swamp rat, in which case it's called a nutria.’