Definitions by T-Roc86

Dirty Rainbow 

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.

Dirty Rainbow by T-Roc86 December 18, 2009