Rainbow Ass

Any person that when they bend over has hair coming out of their butt. Referred to as a "rainbow ass" because it is popping out as rainbows do from clouds.

"Look at that guys rainbow ass,no one wants one of those."

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rainbow ass muncher

A gay man who gives rimjobs.

Momo:: "Rasheed is such a Rainbow Ass Muncher!"

Duji-chan:: "Yea, what an Ass Ninja"

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ass rainbow

An imaginary meteorological event occurring after a severe bout of diarrhea, much as a rainbow occurs after a thunderstorm.

"Oh my god, the Kaopectate finally kicked in... I think I've having an ass rainbow."

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