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When you aim your ass up in the air & shoot diarreah onto someones face
My friend passed out on the couch so I gave him a dirty rainbow
作者 Big Man 2004年2月19日

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1. The act of puking, pissing, shitting, and cumming all over a person as an act of humiliation, thus creating a disgusting rainbow of different colored substances.

2. When one has so poor of a fashion sense that you can only describe what they're wearing as a "dirty rainbow."
1. I heard Alec gave your mom a dirty rainbow last night when she was passed out.

2. Did you see what Alec wore to the dance last night? He looked like a dirty rainbow!
作者 tim171 2008年10月23日

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when you are standing above a girl who is lying down and you blow ur load in her face while shitting on her tummy
Yo i just dirty rainbowd that girl
作者 nickyflo 2009年3月28日

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The act of sticking you whole hand up someones asshole, then pulling it out and smearing it on them, openhanded, in a semi-circle pattern to resemble a rainbow. Similar to a dirty sanchez, but this is much bigger and can be done on other parts of the body.
Hey man, I just gave your sister a dirty rainbow.... Then I shot her my pot of gold.
作者 T-Roc86 2009年12月18日

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