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."

by Barbiste May 27, 2004

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."

by kgriff January 6, 2012

rainbow ass muncher

A gay man who gives rimjobs.

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

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

by Momo Hatake April 27, 2007