Filling up a vagina with skittles and eating them out
Skittles are 2 for 1 at Wawa. Looks like I'll be tasting the rainbow all week!
Eating out one girl of each race.
John ate out Keisha, Hot Legs, Sandy, Ling Ling, and Maria - John is tasting the rainbow.
When 7 men of different colors ejaculate into one's mouth.
Achmed, LeShaun, Jose, Ching-Ming, Eric, and Chief Running-Horse all came into Vanessa's mouth. She really enjoyed tasting the rainbow.
The first time a person (usually a woman) engages in an extremely homosexual act (usually carpet munching).
Dude, did you hear about Emily?
Yeah man, I heard she and Sha-Nay-Nay got drunk at that party and tried tasting the rainbow.
When a "straight" dude sucks a gay's weasel.
Yo man, my boy meek peaced out early last night, he was busy tasting the rainbow.
When a one person sleeps with an asian, black, white, and hispanic in one night
that guy walked in the room with four girls with different races he must be Tasting the Rainbow