Quote Originally Posted by Steve H. in N.Y. View Post
It's part of the new "texting" jargon. IIRC=If I Remember Correctly, LOL=Laughing Out Loud, WTF?=Why The Face?, etc.
A couple of things - firstly, it's not "new" - text message jargon, netspeak and its descendants have been around for more than 20 years. Secondly, WTF does not mean "Why The Face?"; it means "What the F----?"

Besides the others Steve H mentioned, A few examples you're likely to encounter in non-computer gaming contexts include AFAIK (As Far As I Know), IMHO (In My Humble Opinion), ICYMI (In Case You Missed It), FFS (For F--'s Sake) and ROFL (Rolling On The Floor Laughing).