It is basicly a combonation of a few words used on the internet.
These words include:
Rotfl (Roll On The Floor Laughing)
Lol (Laugh Out Loud)
Lmfao (Laughing My Fucking Ass Off)
Omfg (Oh My Fucking God)
Jeff: Heya Steve
Steve: Oh Hiya Jeff...My Dad Died In A Car Accident Today...Im An Orphan Now...I Also Have Aids...Help Me...
Jeff: No ROTFLOLMFAOMFG!!