Rainbow Juice Share definition Flag An elixar to be drunk from excitable lady-bits, every monthly cycle. Not recommended for passing Bartender exams. "I say Willard, care to partake in some rainbow juice?" "My Henrietta, the moon is FULL tonight." Rainbow Juice by ChaseMace September 7, 2005 0 0 Get merch Get the Rainbow Juice mug. Buy Now — $32.95 See more merch