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!

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)

The heavy rain.
The heavy showers with air.
The rain which irritate peoples by any mean.

A lot of rain or raining hard

the cartoon that i look at and wonder, ¨how do they poop?¨

The sexual act where both parties get into doggy position and the man pushes his dick backwards into his partner. Also known as reverse doggy.

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.