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1.
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
dodane przez Big Man luty 19, 2004
 
2.
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!
dodane przez tim171 październik 23, 2008
 
3.
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
dodane przez nickyflo marzec 28, 2009
 
4.
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.
dodane przez T-Roc86 grudzień 18, 2009