"Kek", from "kekeke"/"???", a Korean onomatopoeia of laughter used in the same way to "LOL", may be the Korean equal in the English "haha". Because this is usually used in StarCraft matches, Blizzard, Starcraft's developers, chose to reference it in World of Warcraft (2004): every time a player on the Horde faction forms "lol" utilizing the /say me