A cute type of stuffed animal from the show "Codename: Kids Next Door". They look like chimps with a rainbow fixed to their head. Each are different colors. Agent No. 3 loves them. It's actually quite fun to say.
Then let's go get ourselves a rainbow monkey.
by some punk kid April 30, 2005
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A black homosexual who tested positive with HIV or
when a Rainbow Monkey dies, 1,000 girls will have an abortion
:D jajajajajajajajajjajajajajajaaaaaaaaaaaaaaaaaa
by Fruity Ninga, August 6, 2011
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A alternative rock band previously stationed in Canada. Now better known as Finger Eleven.
Person 1: I found an old album by some group called the "Rainbow Butt Monkeys". It's pretty good.
Person 2: Sounds stupid. You should start listening to Finger Eleven instead.
by iamdabomb182 September 28, 2008
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An African American man parading around in chaps at a gay pride parade

Hey look it's an rainbow butt monkey
by Ladies Man 627 November 22, 2018
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