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."

Rainbow Ass 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"

rainbow ass muncher by Momo Hatake May 7, 2007

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."

ass rainbow by Barbiste May 26, 2004

Shoot rainbows out of my ass 

Extreme happiness beyond comprehension.

I'd like to meet new people (in person) and increase my social circles. If something clicks I'd like to get to know that person better in the name of dating. Eventually find eternal happiness and shoot rainbows out of my ass as I ride around on my unicorn for the rest of my life.

Shoot rainbows out of my ass by Doc Molly February 26, 2015