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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When playing poker (i.e. Texas Hold'em) and some one bets 2 of every color chip
I'll call your measly bet and raise you a double rainbow!
by Tom.Gar.On. 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 dxo July 7, 2010
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Vomiting while having a case of diarrhea.
"Oh my god, last night I was so sick I double rainbowed."

"Double Rainbowing is the worst!"
by travitz west October 2, 2013
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When you are really really high, equal to the double rainbow guy.
Guy 1- "Dude I see leprechauns and elfs and dancing bunnies!"
Guy 2- "Wtf?"
Guy 3- "Oh hes just double rainbowed right now."
by bb+af July 20, 2010
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when someone goes extremely bezerk over something i.e. double rainbow guy
Guy 1: OMG LOOK AT THE LOW PRICE!!!!! ITS SO INTENSE!!! (**he faints**)
Guy 2: (to guy 3) Whats wrong with that guy?
Guy 3: Oh nothing hes just double rainbowing over the low prices.
by yosemitebearposer September 5, 2010
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A rare type of rainbow that may appear all the way across the sky after a period of rainfall. It can be described as very bright, vivid, and intense. However, many have fallen under the belief that a double rainbow is slowly transforming into a triple rainbow. This is impossible, and is an illusion created by either intense sunlight or a rainbow forming adjacent to the double rainbow.
Double rainbow, oh my god! It's starting to look like a triple rainbow!
by ZeroKaiser December 27, 2011
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