water rat

English

water rat (plural water rats)

(US) Any of various rodents from Florida and southern Georgia, especially Neofiber alleni; the muskrat.
- 2004, James McConnachie, Rough Guide to the Loire, page 43,
  Otters are even harder to spot; the coypu, a North American water rat, is more commonly seen.
(Australia) The rakali, Hydromys chrysogaster.
(informal) The European water vole, Arvicola amphibius, formerly Arvicola terrestris.
(US, slang) A petty thief or waterfront ruffian.
(slang) A person fond of water sports.
(slang, Australia) A member of the water police.

Eurasian mammal