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"Kek", from "kekeke"/"ㅋㅋㅋ", a Korean onomatopoeia of laughter employed in the same way to "LOL", may be the Korean equal in the English "haha". Due to the fact this is usually Employed in StarCraft matches, Blizzard, Starcraft's builders, decided to reference it in World of Warcraft (2004): each time a player on the Horde faction kinds "lol"