1. A mentally ill person who 'identifies' as something they are not, ie: gay or trans - who then proceeds to force others to affirm their mentally ill beliefs.
2. A trans-woman (man) who bullies straight men into wanting to 'date' them because they are now a 'real woman' when in reality they are a mentally ill man who wants to have 'gay buttsex' with them.
3. Progressive-democrats.
Boy look at Karen being a rainbow bully to those straight men, always complaining that they do not date a 'real' trans woman... I guess they are just straighter then a rail!
Where there are tons of little, or quite large, bruises on your legs, arms, various parts of the body in different colors, causes may include abuse, weakness, etc.
Girl: "Oh my glob, there is a deadly rainbow on my leg!"
When you do everything sexual (for example: got sucked off, etc) but you didn't actually had any sex.
Kyle: So yesterday Kara sucked me off. It was totally great.
Chad: Dude you and Kara have been together for more than a year and still haven't had sex.
Kyle: Yeah I know, I'm totally getting blue balled.
Chad: It's called a virgin rainbow dude.
Putting food coloring in the tip of a male penis before he cums.
I want to make a pretty rainbow shot😜
Girls who wear ridiculous amounts of colours on their clothing. Play safe. Play black.
"Brittany didn't get the memo about always wearing black, it's 2016... She looks like a rainbow took a shit on her
"Yea totally a rainbow shit."
A stool with substantial length and exit velocity, causing one to ponder butt sex while finishing their time on the toilet.
He: "Man that rainbow shit made me look at Steven differently."
Her: "Ugh why are guys so gay"
An unbelievable occurrence, similar to oh shit or oh snap.
You got to be Rainbow shitting me?!?