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SPF 69 is a term used to describe the climax of sexual intercourse when the man (doing his woman doggy-style) removes his penis from the vagina and skeets on her back, and proceeds to rub it in... like sunscreen.
"He SPF 69'd me before we went out to the beach."

"Well then! No sunburns for you today!"
by JiOnMyBa March 07, 2010
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