The ability to give someone mutliple orgasms at once.
I gave her the dirty Kelsey and she didn't stop shaking.
by Dirty Kelsey December 10, 2018
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With a friend in the bathroom you can commit a dirty kelsey by quickly whipping your top off and going down on the girl that your friend thought he had pulled knowing full well she is on her period.
I wanted to taste her period so when my mate went the loo I done a dirty kelsey on his girl.
by Mush1234 October 29, 2021
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A man who can sniff out a lady on her period and knowing this will at the first opportunity bury his head between her legs. Becomes more excited the more mess.
I know you were just going the loo but I could tell she was on her period so had to do a dirty Kelsey. Don't worry she didn't know it wasn't you.
by Mush1234 October 28, 2021
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