1 definition by RLXTB

It's when 7 girls each wear different colored lipstick the colors of the rainbow. They each put it on really really dark so that it rubs off easily. Then they each find a male and proceed to perform felatio on that person and whoever gets a lipstick mark fathest down wins the race
Omg did you hear Becky won the rainbow races last night!
by RLXTB February 14, 2016
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