"kek" comes from the MMORPG World of Warcraft. People who played Horde could not speak to Alliance players. When they tried to it turned into gibberish. Saying "lol" as a Horde in chat turned it into "kek" for Alliance players. If Alliance players said "lol" it turned into "bur" for Horde players.
A full explanation of KEK, Pepe and the woo woo surrounding Trump. ;)
https://pepethefrogfaith.wordpress.com/
"kek" comes from the MMORPG World of Warcraft. People who played Horde could not speak to Alliance players. When they tried to it turned into gibberish. Saying "lol" as a Horde in chat turned it into "kek" for Alliance players. If Alliance players said "lol" it turned into "bur" for Horde players.