Seen it before but never asked what it was. I never was one for texting or Facegarbage or the like. Showing my age I guess....either that or Lyle is starting to rub off on me.
Lay off the age bit, it reminds me that I am retired.
These acronyms are not so much to do with texting, I do have a mobile phone, most of the time it sits in its box where it should be.
All to do with a different era. Before these forums became popular there was Usenet and acronyms were widely used. I still look at comp.graphics.apps.gimp everyday, very-very few posts now, almost dead.
if ever in doubt http://acronyms.thefreedictionary.com/