rainbow rocket 

A sex challenge in which a person attempts to engage in intercourse with a person of every race/color.

Person 1: Hey, I just completed a the rainbow rocket last night!
Person 2: NICE!

rainbow rocket by tyu123098 December 5, 2017

rainbow rocketeer 

any man who is very open about humping other men and letting them hump him

"dude, that rainbow rocketeer over there was saying how his life partner tore his sphincter in three last night, i about tossed my effinglunch!"

rainbow rocketeer by Tomzilla April 10, 2005