Black Rainbow 

A freshly caught rainbow trout used as a vibrator.

Man, I met this girl who wanted some kinky sex, so I gave her the Black Rainbow.

That prostitute only charged $20 more for letting me give her the Black Rainbow.

Black Rainbow by Just Wrong May 7, 2009

Black-Rainbow 

When two African American Males touch penis tips to create a black rainbow.

I don't think I want to hang out with Rashad anymore he tried to Black-rainbow me last night.

Black-Rainbow by R3l April 10, 2019

Black Rainbow Troll 

A PC Karen who trolls urban dictionary and ruins good things including the REAL definition of black rainbow.

I went to look up the definition of Black Rainbow but all I see is this unseasoned definition. It must have been the PC Black Rainbow Troll red flaging definitions on urban lingo again. Typical Black Rainbow Troll.

Black Rainbow Troll by R3l November 23, 2021

Pot Calling The Rainbow Black 

A variation on the phrase "pot calling the kettle black" that is used when the person being accused by the "pot" is not guilty of the thing they are being accused of while the "pot" is.

Origin: Rainbows are many colors but never black.

Transphobic Cult Leader: Stop indoctrinating children.
Trans Person: Seems like a case of the pot calling the rainbow black.

Pot Calling The Rainbow Black by Shugunou June 14, 2023

black moth super rainbow 

A group known for their excellence in the field of mind blowing and also has the power to make the audience go through a trip without the use of drugs with their music.

... HOLY SHIT BLACK MOTH SUPER RAINBOW IS AWESOME... wait... i think my mind is going to expell all the waste that I have claimed to be good music from my memory.

black moth super rainbow by YAAAAYE! March 14, 2009

black and white rainbow 

When someone is unable to perceive the beauty that is right in front of them.

Unable to wake herself from her compulsive workaholism, she was stuck staring at a black and white rainbow.

black and white rainbow by Dr Bunnygirl January 12, 2019

rainbow back

A gay Mexican

Guy 1: I seen tiño at the gay bar yesterday

Guy 2: what a rainbow back

rainbow back by Whateves2016 June 28, 2016