As correctly stated, this is a literal phrase dating from 17th century England. Back in the day, peasants used what little land they owned for crops and such, so could not afford to keep cats and dogs on their land. As a result, people used to keep their animals on the thatched roofs of their cottages. When it rained heavily, the thatching became very perilous and slippery, causing the cats and dogs to fall off!
by NickR June 9, 2005
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We say it's raining cats and dogs when there is a heavy downpour. It simply means a heavy rain.

The saying presents an interesting image of animals falling from the sky, that doesn't seem to have much to do with torrential rain, and experts aren't certain about its origin.
The most likely and least appealing theory is that rain storms in 17th century England would carry the bodies of dead animals through the dirty city streets inspiring people to say "it's raining cats and dogs"
Example: -Sorry I'm late for work it's raining cats and dogs and the streets are flooded.
-when it rains cats and dogs, you tend to get very wet.
by NB1906 August 29, 2022
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A full back stretch; you must bend over like you are taking it in the butt and go back and forth until it feels better (may take a while)
Megan's back really hurt after her workout so she did the cat and dog stretch and it suddenly felt amazing as if she got it in the butt.
by Kramden123 March 27, 2015
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The heavy rain.
The heavy showers with air.
The rain which irritate peoples by any mean.
I was stuck for four hours as it was raining cats n dogs.
by LaWSiR August 18, 2006
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A sexual act between a man and a women. Also can be man on man. It is similar to scissoring, except it is more majestic and beastly!

Best performed on a long couch.
Dude: Baby lets Cat-Dog
Gurl: meowww
Dude: I guess that means I'm dog
by haleme July 9, 2016
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When two men are docking both of the men simultaneously piss in each other's dick
Man oh man, me and jimmy totally did the cat-dog last night, best time of our life's
by Bloody smegpot April 9, 2014
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