Edited For Sarcasm:Used in internet forums, to convey an even harsher subtle form of sarcasm. Maybe directed at an individual or group when modifying a quote or story. Also acceptable, as an inside joke between users on the forum.
Example:
"ZOMG! The obligatory "OMG HALO" post! I'm so cooool anti-conformity FTW!!!"
"Laugh Silently In My Head Because It Wasn't Actually Funny Enough For Me To Laugh Out Loud"- Other known as what REALLY happens when one of your friends texts, or says "L.O.L"
John- Yeah, i had to walk 37 miles to get home...
Frank-"Lol"
John-"..."
what really happend when Frank heard that was L.S.I.M.H.B.I.W.A.F.E.F.M.T.L.O.L.