It rained cats and dogs outside.
Meaning: This is a fun way to describe very heavy rain. It means that the rain is coming down in sheets, so much that it looks like cats and dogs are falling from the sky.
Choice of Words: Rained is a past tense of rain, which means water falling from the sky. Cats and dogs are common household pets. When you put them together, it means heavy rain.
Alternative Expressions
Related Expressions