A word meaning "yes" or "ok" in some slavic countries in Europe ( i.e. Slovakia, Czech Republic ). Translated it is supposed to mean "of course, of course" ( - "jasne, jasne" => therefore the two Js). Very often used in chat rooms, on ICQ or MSN, or any online-games like Counter-strike.
translated:

"R U staying for the next map?"
"jj"

"Damn, that was cool!"
"jj, I liked that..."
by 3shit November 15, 2007
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JJ is a guy that's incredibly attractive and has a huge cock (bigger than average)
Damn look at JJ's dick....
by Alex Richard December 23, 2016
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just joking - used in msn conversations etc
pity u don't ... jj
hahahah
by Ched September 10, 2005
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It stands for "Just Jesting" and is a sophisticated alternative to jk
Bob: "Hey Gina, you look fat in those pants!"
Gina: "Why you son of a..."
Bob: "JJ!"
Gina: "haha!"
by cool4dude March 21, 2006
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Jj's fucking amazing.
He's so white you guys.
Jj has a boner.

Kaythxbai.
I

Love
You
Jj.
by sound like cool. January 07, 2012
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JJs is a Huge of Harris J's fans Name around the world. JJs day is on 30th November, 2015. Harris give this name for us when he was come to indonesia in 2015
by Unknown JJs October 02, 2017
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