water dog Meaning, Definition & Usage

  1. noun a person who enjoys being in or on the water
    water rat.
  2. noun a dog accustomed to water and usually trained to retrieve waterfowl

WordNet

Wa"ter dog`
Definitions
  1. (Zoöl.) A dog accustomed to the water, or trained to retrieve waterfowl. Retrievers, waters spaniels, and Newfoundland dogs are so trained.
  2. (Zoöl.) The menobranchus.
  3. A small floating cloud, supposed to indicate rain.
  4. A sailor, esp. an old sailor; an old salt. Colloq.

Webster 1913