When a group of girls wear different colored lipstick and suck a guys dick, leaving different colored rings on the dick. Creating a rainbow effect :)
by Shwanky240 July 14, 2009
When people from different races have sex, calling it rainbow sex, because of all the different skin colours there are.
A dark person, a fair person, a caucasion person and a mixed person have an orgy, it is called rainbow sex
by superhungarishman April 6, 2010
by Bleeky November 6, 2019
by Sun May 11, 2006
A type of sex that happens between two virgins, people often see rainbows when having this sex because it is awsome.
Anne: how did you lose your virginity?
Ella: i lost it while having rainbow unicorn virgin sex
Anne: Wow! I lost mine while having awkward virgin sex.
Ella: i lost it while having rainbow unicorn virgin sex
Anne: Wow! I lost mine while having awkward virgin sex.
by Rainbow:unicorn:sparkle:times December 13, 2016