Cats And Dogs Idiom. “it is raining cats and dogs” is an english idiom. It's raining cats and dogs!
There are several theories, one being that the phrase raining cats and dogs references the mythologies of the norse god odin and english witches. You can use this idiom in any verb tense form: Raining cats and dogs means its pouring heavily.
Whether swift coined 'raining cats and dogs' and whether he meant that to be a reference to the animals being washed through the streets in heavy weather is entirely speculative.
It simply means “a heavy rain.” a synonym for raining buckets. True meaning and origin of the idiom ‘it’s raining cats and dogs’ don't go out, its raining cats and dogs! we have all heard this statement, many times we sit and scratch our head to understand its meaning. Raining cats and dogs means its pouring heavily. The most plausible (and awful) comes from london in the 1700s.