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"
by GarthAlgar2598 May 18, 2008
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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.
by Mercury December 22, 2003
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When a man gives oral sex to a woman while she's got her period.
"He gave her a rainbow."
by Kiki Diki January 17, 2009
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Pure 'Gayness'...Yeah
Boy 1: "RAINBOW!"
Boy 2: "gayness -_-"
by maurin August 21, 2005
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1: Tripping on the potent psychedelic drug 2C-P, also known as 'Rainbows.' due to it's production of multicolored soft pastels visuals that breach the color spectrum. 2C-P is a phenethylamine psychedelic of the '2C' class.

2: Overcome by the intense psychedelic high of 2C-P.
I did 20 milligrams of Rainbows last night. I freaked.

I am rainbowed.
by starfire_X February 11, 2012
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A bunch of colors, usually 5, 6, 7, or 8. It can be bright or pastel, but it usually at least has blue, green, red, and orange (a small rainbow). A large one has blue, green, red, orange, yellow, purple, and pink.
by THEYWiLLNEVAHKNOW! June 4, 2005
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When you and your girl have a threesome with another girl. Then your girl has way more fun than you are with the other girl. Then dumps you for that girl
When Billy laughs at Tom when he got dumped by Becky with his side hoe.
"Ha Ha you've been left In The Rainbow" he laughs out.
by Tent_The_Bean June 7, 2017
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