Rainbow Biscuit 

A rainbow kiss but the contents of the mouth is spat out on to a biscuit then eaten.
bon appetite!

I'm on, horny and hungry! Fancy a rainbow biscuit?

Rainbow Biscuit by Roger man January 23, 2008

Rainbow Syndrome 

To be gay or to have gay qualities or traits.

"man.. i think Adam's got rainbow syndrome. i saw him at a gay bar makin' out with a guy last night"

Rainbow Syndrome by victr0la January 26, 2007

Rainbow Tits 

Rainbow tits is when you eat fruit loops and lucky charms and then you vomit on a girls boobs and then eat it off.

" I gave that girl rainbow tits last night "

Rainbow Tits by BluntLord420 January 27, 2014

Rainbow Six Siege 

A video game where if this is the only game you play then your just a bunch of gay males who talk about which guys is the hottest in the classroom then meet the next day on the swings to make out

Luke: Hey did you hear mike is addicted to rainbow six siege
Arthur: Yeah he must be really fucken gay

Rainbow Six Siege by FrostedFlakes69 April 17, 2020

rainbow dog 

The act of a female having anal intercourse with a sausage and then normal intercourse after while having her period. The sausage is then served as a hot dog to her partner.

I wanted to taste my partner's body fluids so I convinced her to make a rainbow dog.

rainbow dog by Peter Zaluzni December 12, 2008

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

rainbow cum 

the cum know to be made by unicorns.Often is mixed with fairy piss to make hallucinogenic.

Dude Rainbow cum fucked me up last night so bad that I shit on my dog.

rainbow cum by velma green the spider queen December 13, 2012