Russian Rainbow 

When a girl is giving a knob job, she puts Skittles in her mouth right before the guy skeets. As he skeets in her mouth he says, "Mmm, taste the rainbow, slut!"

"Man, Jake's mom gave me an awesome Russian Rainbow last night."

Russian Rainbow by hercules slovakia February 15, 2006

Russian rainbow 

Its the act of eating your baby brother while snorting some cocaine.

Oh look at Michael he's doing a Russian rainbow.

Russian rainbow by Giannisantetokounmpo December 2, 2020

Rainbow Russian Roulette 

The act of inserting a fist full of multicoloured skittle sweets, into the rectal passage, before being rogered in the poop choob. After the money shot, the brave buccaneer takes position and the fruity goo is ejected into his or her mouth, trying to guess what colour or flavour they will get next.

Hey, I played Rainbow Russian Roulette with Dave Smiths mum and dad last night! Dirty Fuckers!

Rainbow Russian Roulette by carpetfrog March 14, 2007