Raining cats and dogs

IDIOM:Raining cats and dogs.
MEANING:Raining heavily; raining very much.

INFORMATION
This idiom is a bit outdated but is still used by a large part of the United Kingdom's population.
Its origins are completely uncertain, but some say that it could derive from Mythology, or refer to the fact that cats often fall down from the roofs when it's raining outside.

So now, when someone tells you that it's raining cats and dogs, you won't get hidden under the cars anymore ^^

Ready to use it?

DEFINITIONS
To be outdated: something that is outdated is a little old and obsolete.

It's raining buckets is more popular over here. (Just thought I would share)

You were right to let us know about it
I'm always happy to learn more idioms from English language
That's why I will talk about one of them once a week, on this very forum