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The sign to humanity that a gay has been born
Person A: LOOK A RAINBOW
Person B: Ok..?
Person A: A GAY HAS BEEN BORN
Rainbow by NoImNotAttractedToPans January 4, 2020
Rainbow means a person or a thing who is LGBTQ+.

(No hate)
Teacher: What is your gender Jerry? Are you female or male?
Jerry: BUT.. I'M RAINBOW!
Rainbow by IDontExist404 July 11, 2021
A smart-ass blonde who is smarter than most brunettes. She has blues eyes and she is also very magical and more special than you think.
I love you Rainbow!
I love you too!

Yeah!!

*Run off a be magical*
Allegedly made of happy thoughts, dreams, chocolate unicorns, gumdrops, licorice sunsets, fuzzy gumdrop bears, and chocolate-covered gumdrop lands.
Meatwad: "You don't need a machine to make a rainbow"
rainbow by GarthAlgar2598 May 17, 2008
When a guy goes down on a girl on her period and keeps it in his mouth, then she goes down on him and keeps it in her mouth, then they kiss and mix it together (a.k.a. period blood and jism)
She's on the rag, so last night they made a rainbow.
Rainbow by Mercury December 22, 2003
When a man gives oral sex to a woman while she's got her period.
"He gave her a rainbow."
Rainbow by Kiki Diki January 16, 2009