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..."
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