From the word "on" in French, jack sur means to abstain from masturbation, sex, and everything else pertaining to any type of sexual pleasure where the penis or vagina are touched. (You can have other types of sex and still be jack suring.)

This word is the opposite of jack off. It can also be used as a noun meaning a person who practices jack sur.
Person 1: "I'm going to be jack suring during NNN. I will win it."
Person 2: "Yeah, you've always been a determined jack sur."
by WordlessSpeaker October 28, 2021
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