When you eat out an Irish girl, and she forgets that shes menstruating.
When I ate out Aishling's twt before sexxxxx, my mouth got full of blood. I hope I forget this by 2mm. Rainbow Kiss!
by Eyerish November 28, 2006
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simply performing oral sex on a woman when she is on her period.
'just because im on the rag doesn't mean u can't lick me out'
'shit no bitch i ain't givin you no rainbow kisses'
by Gregoregory October 30, 2007
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When a blokes cums in a womens mouth, while the bloke eats her pussy getting a nice mouth of blood. Then they kiss and mix the cum and blood together.........nice!
"I got a nice rainbow kiss off Sharon last night"
by The expert April 09, 2006
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when you go down on a girl during her period
girl a 's'pose nothing happened last night cos it's that time of month'

girl b ' actually he gave me a rainbow kiss'

girl a 'never had a guy game enough to do that to me b4'
by lantern January 22, 2007
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when girls all put on different color lipsticks such as red orange yellow green blue and purple rainbow colors and take turns giving a guy head so it looks like a rainbow on his dick
Billy almost got a rainbow kiss last night from that group of girls.
by anonoymous May 14, 2004
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A rainbow kiss is when you have multiple girls or a single girl give you a kiss with different color lipstick on.
You need to have lots of colors to have a rainbow kiss.
by Iranoutofideas May 16, 2015
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