Not originally from World of Warcraft as some people think, 'kek' is the Korean approximation in english of laughter when typed on a Korean keyboard during Starcraft matches. As Starcraft was made by Blizzard as is world of warcraft, their connection to laughter in both games seems to be an homage of sorts.
Matt: OMGWTF you just got zerg rushed in the face!!!11
Trevor:Fuck that!
Matt: kekekekekekekeke
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