rainbow beard 

When a man's facial hair grows in patches of different colors.

Jeff's has a blonde mustache, black neckbeard, and red patches near his chin. He's got epic rainbow beard going on.

rainbow beard by Jackerman90 November 29, 2009

Rainbow dook 

A solid piece of phecies comprised of several colors, such as a rainbow. This is easily achieved when an individual eats an entire box of fruit roll-ups in one sitting.

"Dude, that rainbow dook was psychedelic!"

Rainbow dook by psychobiological April 18, 2010

rainbow up

the politically motivated practice of diversifying the gender, racial and ethnic makeup of an organization or institution.

I just looked at our quarterly employee demographics. We really need to rainbow up by the end of the year.

rainbow up by DIADEN June 29, 2010

Rainbow Huffer 

Someone who has anal intercourse then sniff the blood out of the ass, if there is any blood apparent

That girl is a rainbow huffer for doin that to MehKaila

Rainbow Huffer by Cdab3ast November 28, 2010

Rainbow Youth

A homosexual adolescent, teen, or young adult, of either gender. The name "Rainbow Youth" is derived from "Hitler Youth", based on the misconception that gay people "recruit" youths to their "team". See also Rainbow Lady and Rainbow Man.

At the LGBT alternative prom, I saw a ton of Rainbow Youths macking it on the dance floor!

Rainbow Youth by Rainbow Lady March 5, 2011

Rainbow Bulimia 

the act of eating a series of red, orange, yellow, green, blue and purple rice krispie treats and then vomiting them back up.

Matt got drunk the other night and did some rainbow bulimia. What a show off!

Rainbow Bulimia by Cartesian Theater August 23, 2011

Rainbow Dump 

A shit so massive it goes from one end of the spectrum to the other. It typically starts off as a dry, hard bowel movement and ends in diarrhea.

Person 1: I was on the toilet for 20 minutes...
Person 2: Constipated?
Person 1: Nah, just took a rainbow dump... It kept coming.

Rainbow Dump by Ark-7 February 29, 2012