Internet speak...

[Yanah_God]

If I was standing next to somebody and they typed any chatroom acronym, I would rip out their throat and shove it up their ass.

[RenmazuoGK]

Personally, I prefer not using it. Once in awhile, I will bust out a "lol" or "brb," though. Pretty much any other time, I'm making fun of someone who overuses it. Like when people put "lolol" I'm like "OMG WTF OLOOLOLLOOLOL DAT WAS T3H FUNNY"