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When a group of girls (each wearing a different color lipstick) perform oral sex acts on a group of guys. The man to collect the most colors, on his johnson, after a given time wins the "rainbow race"
We convinced a group of girls from the SUC sorority to help us with the rainbow race during rush.
by spetznas1911_crazy russian January 04, 2012
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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 September 15, 2016
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