Rainbow Roulette 

Rainbow Roulette is a drinking game in which a group of gay men randomly select mixed drinks that all but one have been drugged with viagra. The last drink is drugged with rohypnol.

Make sure you bring plenty of lube when playing Rainbow Roulette.

Rainbow Roulette by Wooticus Maximus October 11, 2016

Rainbow Roulette 

When a bartender puts LSD into one of the bottles and forgets which.

"I forget which bottle I stashed the LSD in."
"Give me a shot of everything, time for a game of Rainbow Roulette."

Rainbow Roulette by cajunmike September 13, 2011

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