A rainbow kiss is what you call when someone performs oral sex on a girl going through menstruation, then proceeds to kiss her.
Friend 1: last night was so weird
Friend 2: didn't you have Jeremy come over?
Friend 1: yeah, he gave me a rainbow kiss
Friend 2: didn't you have Jeremy come over?
Friend 1: yeah, he gave me a rainbow kiss
by Auburn_Loser April 21, 2021

When a girl has her period, a guy eats her out and holds the blood in his mouth, while the girl sucks the guys penis and holds the cum in her mouth.
by briswife September 26, 2023

The rainbowism is real!!!
by Good 4 u extraordinaire May 7, 2022

Man, I can’t believe you ordered Rainbow-nanza when you could’ve gotten strawberry with gummy bears!
by Toothpast3z September 25, 2025

slang for having sex
So last night my boyfriend and I were about to double the rainbow but my mom called and killed the mood.
by chicagobears1 April 6, 2011

by StandfordPines April 4, 2017

by The rush hour... June 5, 2018
