Raining cats and dogs 

Means it is raining VERY hard.

Shoot! How can I make it to the Airport when it's raining cats and dogs?

Raining cats and dogs by Luckyspin888 March 11, 2017

Raini 

A girl that has multiple theories about pretty much everything. Rainis love the ocean and have fair skin. They have a smokin' hot bod and are almost a ginger. Many girls are jealous of her but don't admit it. Rainis talk a lot and are, overall, pretty damn awesome.

That girl must be a Raini.
Why?
Because she is just so awesome.

Raini by Ramona French January 8, 2012

Raining in brown town 

To have very loose or watery bowl movements. Diarrhea.

I was totally excited for my day off until it started raining in brown town and ended any fun I was about to have.

Raining in brown town by Markhitz September 8, 2009

Raining Love 

The act of filling up a glass or any type of container with semen, spreading it across a fan, preferably a sealing fan, before a party, and some time throughout that party turn the fan on a let the love rain.

Oh dude last night I preformed a raining love and everyone went crazy.

Raining Love by MikeyDaMan May 16, 2011

Raining Titties 

(v.) The act of a woman's breasts exiting the brazier and entering anywhere on the body (normally hands and/or mouth) of the significant other.

Bob: "Hey, man, how was last night with Sheila?"
Bill: "Let's put it this way, it was raining titties!"

Raining Titties by Screwy McFuck May 13, 2013

rainicorn 

Meaning: a rare breed of unicorn found in extreme rainbow climates, over thousands of years they have mutated to become multi-coloured and from their bright and beautiful coats they can mate with all breeds of unicorn and carry a litter of up to 10 rainipuppys

Wow look at that amazing rainicorn! And its rainipuppys

rainicorn by MIZORY800 September 20, 2014

rainberry 

A cult favourite flavor of the famous energy drink Gatorade that has a light, fruity taste and a pale purple color. It's one of the brand's lesser known flavours and it's still available in certain places under the name Frost Rain Berry.
Basically, it's just something rare to find.

Boy: you're like rainberry, pretty epic and hard to find.

rainberry by Poseidonn October 18, 2020