when different girls each put on different color lipsticks and suck a guys dick and leavs a mark of the lipstick color on it
"yo dude i went rainbowing last night with jess, jess, lis, and kira!"
by Jess November 14, 2003
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The act of eating out a female whilst they are having their period.
Nick spent his time eating Sarah out, and when he rose Sarah noticed blood around his lips.
by Dark Kitten April 9, 2005
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The act of being homosexual or taking part in activities only an individual who is homosexual would take part in.
Sarah: "John was rainbowing so much at the party last night."

Eric: "I know. All that PDA with Ben was disgusting. We all know he's gay. He didn't need to show it."
by dghul May 30, 2009
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(rān′bō′ éd)

When a doof's atmosphere elevates to such an extreme level that it causes the releases of natural endorphins in the brain. These endorphins, combined with the enriched nature of your soul and a mixture of substances as copious as they are numerous, combine into an potent cocktail causing a blissfully euphoric emotional state in which one's identity and conscience merge into the festivals collective-being. Often expressed by dancing.
I was at Rainbow Serpent Festival with the rework crew last year, everyone was so rainbowed.
by howsyarainbow?havingagoodtime? February 4, 2014
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A phrase that is often said following something homosexual. Another way of saying "No Homo" or "Pause"
by Hakhmeed August 16, 2008
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Having the appearance, ambience, or majesty of a rainbow.
“The light reflecting off those bubbles is very rainbowic.”
by Incrediboy October 19, 2018
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