KK

The meaning KK was first derived on the gaming Scene when MSN Messenger was very popular back in the later 1990's
Glittery icons could be assigned to letters on the keyboard. When MSN started to fail kk would show up and not the glittery picture in it's place. The player Bollox started the trend and still has the intel 466 PC that started this phenomena which is still commonly used till today on popular chats.

"Are you coming on the game"
"yes be there in a few"
"kk"