Raining cats and dogs 

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!

Oh golly, it sure is raining cats and dogs old chap!

Raining cats and dogs by NickR June 22, 2005

raining sideways 

When shit is just overly crazy and uncontrolled.

Daquan, these bitches be getting white girl wasted up in that bitch, shit is raining sideways.

raining sideways by MFXtreme August 29, 2014

raining douches 

When a series of people say "douche," hence forth making it sound like it's raining douches.

Guy 1:"Dude you're such a douche!"
Guy 2: "Doucheeee"
Guy 3: "Doucheeee"
Guy 1: "Doucheeee"
Guy 2: "It's raining douches!"

raining douches by shacklehoot January 21, 2010

Kylo Renning 

To Kylo Ren someone:
When giving a blowjob, the giver reaches up in a Kylo Ren motion to choke the receiver as they continue to give a blowjob to climax. The giver must have long arms to achieve this incredible feat.

Did you hear that Taylor was kylo renning Xander last weekend? He said it was the most intense sensation he’s ever had.

Kylo Renning by Lzrdgrl July 30, 2019

Raining April 

Anal sex. This can also mean anal rape, and is a code for anal sex in public.

"Hey, Jimmy, guess what? I was raining april all over Kate last night!"

"I love to Rain April on people!"

"Hey, did you hear the news? Some guy got put in prison for Raining April on some people!"

Raining April by Whittsnake May 24, 2005

you are ruining my chances of getting a puppy! 

That is correct ☆𝙨𝙝𝙖𝙬𝙩𝙮☆

You are ruining my chances of getting a puppy!

you are ruining my chances of getting a puppy! by Cloudii.vss April 29, 2021

piss on my leg, and tell me it's raining

Disbelieving response to an attempt to mislead, equivalent to: "pull the wool over my eyes"

You tell me that you've worked as an airline pilot and a surgeon, too? Go on ... you'd piss on my leg, and tell me it's raining.

piss on my leg, and tell me it's raining by ursamel July 24, 2007