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-just kidding
-What people use to say crap about you to you in your face and mean it but not be a complete jerk directly to you, but still are.

FYI: 75% of the time people say JK they aren't...
(Football Team's record is 0-10)
Player: You are the freaking worst QB I have ever seen!! JK!
QB: ..... ..lets see you do it......
by David Rivera May 21, 2006
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Just kidding. Used at the end of a sentence to make it completely void, therefore contributing nothing to the conversation and wasting everyone's time.
Therefore used mainly by n00bs and tards.
Tard:I hate your country, I hate your culture, and I hate your FACE! jk
Someone else: stfu
by Johnny The Homicidal Maniac November 06, 2005
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Stands for ‘just kidding ‘.

Seriously, if you don’t know what JK means, you should go jump off a cliff.
Kid: “Bro, he’s such a stupid dude, I could get him to eat shit without hesitation.”

Above mentioned dude: “What the fuck did you just say about me!!!!!?”

Kid: “JK dude. Chill out, it was only a joke—“

*gets beat up*
by Kirishima Touka February 25, 2018
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Something you say at the end of
a sentence to avoid getting beaten up when you
call someone a useless fucktard
by Mrtalldude94 June 30, 2010
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