Hence the R.O.F.L
But just like every other word from the internetz it has evolved in many ways such as roflmao meaning rolling on floor laughing my ass off. It has also seemed to evolve to food products such as rofl my waffle or rofl my brothel sprouts.
Delores: Rofl why?
Jim: Because sex with male donkeys are good luck
ROFL can be merged with other accronyms to created super l33t acronyms that "r0x0r y0ur b0x0rs" per se. Some examples of the merged accronyms are as follows:
ROFLAARP: Rolling On Floor Looking At Assorted Rodent Pornography
ROFLEW: Rolling On Floor Laughing whilst Eating Waffles
<admin> rofl. Are you ROFLEW?
<noob> Nah dude! I'm totally eating them at a table.
Person1: Shut up. You sound like a friggin' twit. I hereby revoke your right to speak my language.