Acronym for "Rolling On the Floor Laughing My Ass Off Barbecue". Almost exclusively used to poke fun at overuse of stereotypical internet acronyms such as lol, rofl, wtf, omg, etc. If spoken, it is pronounced Roffle Mayo Barbecue. Use of this acronym may indicate its user is sick of having to endure all the newbs using the above acronyms, or could be meant in a more lighthearted way.
Newb: "Omg lolz! i pwned that ganker with a headshot!"
Newb-hater: "Roflmaobbq....."
"ROFL" is way to short of an acronym to properly describe the immensity of the laughing. Attachment of any number of recognizable acronyms (such as FBI, NASA, BBQ, etc.) after "ROFL" indicates extreme laughing power.
Rolling on the floor, laughing my arse off, while eating a bacon sandwich. Superior in every way to roflmao, as you are not only saying just how funny this is but, also, that you were in the middle of lunch when you saw it.