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general::
Phrase(s): It’s raining pitchforks (and hammer handles). [and] It’s raining cats and dogs.
Rur. It is raining very hard. • Take an umbrella. It’s raining pitchforks and hammer handles out there! • Charlie: Have you looked outside? How’s the weather? Mary: It’s raining cats and dogs.
McGrawhill's American Idioms And Phrasal Verbs