Kek

   Kek means [1]lol. It comes from [2]World of Warcraft where the two
   opposing factions (Horde and Alliance) were made to speak mutually
   unintelligible languages as an attempt to prevent enemy players from
   communicating; when someone from Horde typed "lol", an Alliance player
   would see him say "kek". The other way around (Alliance speaking to Horde)
   would render "lol" as "bur", nevertheless kek became the popular one. On
   the Internet this has further mutated into advanced forms like kik, kekw,
   topkek, giga kek etc. Nowadays in some places such as [3]4chan kek seems
   to be used even more than lol, it's the newer, "cooler" way of saying lol.

See Also

     * [4]lulz
     * [5]meme

Links:
1. lol.md
2. wow.md
3. 4chan.md
4. lulz.md
5. meme.md