Top definition
The act of writing "jk" after saying something borderline risky to someone else online, to ensure the preservation of your reputation.
Guy 1: "I totally had to throw in a safety jk when talking to Jen the other day."

Guy 2: "Really, let me see the convo!"

Guy 1: "Hey Jen, wanna go out tonight? I've been wantin to see them titties for a while now! Jk
by i.foster.friedman May 25, 2009
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