Rofl means rolling on floor laughing.

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.

ROFL is text/chat language for Rolling on floor laughing

it is lol but funnier

Roll over floor laughing a cominly used saying in instant messaging

Rolling on floor laughing

rolling on the floor laughing.
like when your drunk you do it.
but you use this on myspace+ msn instead of boring old lol.
Cool kids say it in everyday convo. *coughme*

Rolling over Fucking laughing