Rainbow Panther 

–noun
a member of a militant gay American organization, the Rainbow Panthers, which was formed to work for the advancement of the rights of gays, often by radical means.

Check out Jon and Brian, those Rainbow Panthers just got done burning a flag and holding a rally outside of the Baptist Church because they aren't allowed to marry, and now they are drinking cum out of each others asses using twisty straws.

Rainbow Panther by the Augur May 11, 2007

Dirty rainbow 

when you are standing above a girl who is lying down and you blow ur load in her face while shitting on her tummy

Yo i just dirty rainbowd that girl

Dirty rainbow by nickyflo March 28, 2009

Dirty Rainbow 

The act of sticking you whole hand up someones asshole, then pulling it out and smearing it on them, openhanded, in a semi-circle pattern to resemble a rainbow. Similar to a dirty sanchez, but this is much bigger and can be done on other parts of the body.

Hey man, I just gave your sister a dirty rainbow.... Then I shot her my pot of gold.

Dirty Rainbow by T-Roc86 December 18, 2009

rainbow girl 

A girl who gets fucked with multiple different shades of men inside her.

Jen is such a rainbow girl, she had John, Stewart, Jerome, and Jake inside her last night.

rainbow girl by Good'Ol Mother fucker June 10, 2017

Rainbow baby 

A baby born of a LGBQ+ couple

She’s a rainbow baby.

Rainbow baby by Productofbecky March 10, 2019

Mrs. Rainbow 

Lindsay Lohan and/or being very colorful, radiating a similar positive vibe, generating smiles.

Originally she was refered to as Lindsay "Rainbow" Lohan because her fans imagined that's what she would smell like (like a rainbow). But since 'rainbow' can also be used to describe her appearance - in it being very colorful and radiating a similar positive vibe, generating smiles and so on, she quite simply became Mrs. Rainbow - a person able to bring colors into our lives and positive vibes into our hearts.

Mrs. Rainbow by Rooster Fitdse November 6, 2008

Triple Rainbow 

Such intense amounts of joyous orgasmical ecstasy that it makes Double Rainbow feel like torture
Refer to Double Rainbow

Johnson: Dude I just saw Inception yesterday.
Randolf: Oh yeah? How was it?
Johnson: Dude.... TRIPLE RAINBOW!!!!11!!1

Triple Rainbow by BOYETCHLES July 20, 2010