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Verb: rain cats and dogs
  1. Rain heavily
    "Put on your rain coat-- it's raining cats and dogs outside!";
    - pour, pelt, stream, rain buckets, tip [Brit], bucket [Brit], chuck [Brit], teem, chuck it down [Brit]

Derived forms: raining cats and dogs, rains cats and dogs, rained cats and dogs

Type of: rain, rain down

Encyclopedia: Rain cats and dogs