When a man is on another man lap getting anal. The guy on top gets a reach around, and the one on bottom pulls out at the same time they squirt their load.

The double rainbow.
You think bukake is disturbing, check out the double rainbow!
by Louis the brawler November 16, 2010
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phrase commonly used during peak sexual arousal.
Jenny: "Ooo..yes...ooh...uuh..DOUBLE RAINBOWWW!"
by jfigdig July 7, 2010
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The act of coitus interruptus followed by urination, i.e. pulling out early, cumming on a female's stomach, then immediately
pissing whilst the penis is still erect, such that both fluids form a rainbow-like arc.
After six King Cobras and already breaking seal, I couldn't hold my piss in anymore, so I figured I'd give my girl a double rainbow. She was so happy she cried 'Double rainbow all the way, what does this mean!?!'
by Palin '12, Cuz It'd Be Funny November 5, 2010
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An innuendo for multiple orgasm. As made famous by youtube actress Ceciley's verbatim, passionate interpretation of Hungrybear9562's viral video "Double Rainbow" In which she sounds like she is having multiple orgasms.
He showed me a double rainbow last night.
by cherprin July 16, 2010
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Pure unequivocal elation at seeing two of anything, particularly rainbows. Originated from a youtube video (search for Yosemitebear Mountain Giant Double Rainbow) where a man is so incredibly taken aback by seeing two, almost three rainbows!

He then proceeds to cry from happiness, as you too would do if you were there.
I can't believe I just got a raise AND a blumpkin!!!!!!! IT'S INCREDIBLE!!!!!! IT'S LIKE A DOUBLE RAINBOW!!!!!!!!!!!!
by MadP July 23, 2010
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intense joy, coupled with extreme emotional shifts; an experience equal to an orgasm
OMG, it's a full on complete double rainbow all the way across the sky!
by JERKER19 July 17, 2010
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