When two bisexual people date.
That double rainbow will never work out, they are both too slutty.
by CurlyGirlie June 11, 2015
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Double rainbow - when two guys cum over another guys face at the same time, hence crossing spunk streams - meaning to be double rainbowed.
"I really want a double rainbow tonight"

"Fancy a double rainbow?"
I really want to double rainbow him, are you up for it?"
You should have seen the double rainbow I got last night.
That was the best double rainbow I've ever had.
by cockmaster346 February 4, 2010
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A gay sex position where a man does a back bend, then the second man inserts the first man's penis into his rectum, then proceeds to do a back bend over the first man with the penis still inside of him.
He's so gay he did the double rainbow with your dad last night!
by Doublerainbow April 16, 2015
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When a male jacks off two other males, especially if they have big dicks.
Last night, I saw a double rainbow!
Dude, you weren't part of it?
Nah, I sat back and just enjoyed it.
by Eyx September 30, 2016
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The highest level of excitement; it is often expressed with words or phrases like “full on” and “all the way.” Shouts of exclamation may accompany, creating laughter that is indecipherable from sobbing.

TRIPLE rainbow excitement” is extremely rare and could cause you to spontaneously combust.
When I kissed Shannon goodnight for the first time I ran home jumping and yelling. That was some full-on double rainbow excitement, man!
by whiteboyDJ March 12, 2011
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Nathan Fillion recommends that the new "in" phrase be: Double Rainbow.

It means that which is:

•ecstatically wondrous

•joyfully amazing

orgasmically blissful
Here are some paraphrased usage examples for Double Rainbow from Nathan Fillion and his Twitter page, among others:

"That pizza was so Double Rainbow. Oh my god."

"Possible responses to "Double Rainbow": -Double Rainbow, all the way. -Starting to look like a TRIPLE Rainbow. -What does it mean?" Answer: "A Full-on Double Rainbow!"

That video is so vivid, it's Double Rainbow all the way!

Having a second season of Firefly? Definitely Double Rainbow!.

The brilliance of Nathan Fillion is so intense, it's Double Rainbow all the way!
by Kcat10 July 16, 2010
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The highest level of excitement; it is often expressed with words or phrases like “full on” and “all the way.” Shouts of exclamation may accompany, creating laughter that is indecipherable from sobbing.

TRIPLE rainbow excitement” is extremely rare and could cause you to spontaneously combust.
When I kissed Shannon goodnight for the first time I ran home jumping and yelling. That was some full-on double rainbow excitement, man!
by whiteboyDJ March 9, 2011
Get the double rainbow excitement mug.