ROFLMAOKCAB 

Rolling,On,Floor,Laughing,My,Ass,Off,Kicking,Cats,And,Babies, a term coined online for laughing at a joke made by a close friend that will one day result in an amazing nickname, inside joke, or story.

Joe: What if I started calling you (hooliganvonhooliganberg), and then i told your work that was your new name, they would be like HOOLIGANVONHOOLIGANBERG, WTF, WE USED THREE NAME TAGS TO DO THIS NAME, GET OUT OF OUR STORE NOW!!

Steve:ROFLMAOKCAB

Jack: BILL LOOKS AT GAY (pr0nz)

Joey: Dude, ROFLMAOKCAB

ROFLMAOKCAB by sprinkles7897 December 6, 2009

ROFLMAOGCB 

Taken from the great slang booty
But added some few words:
Rolling On Floor Laughing My Ass Off Getting Carpet Burns.
This means that something is really... but REALLY funny.

ROFLMAO look at dat n00b geting hiz ass pwn3d!

ROFLMAOGCB by c0nSi January 27, 2004

ROFLMAOABOA

Is short for Rolling On Floor Laughing My Ass Off And Back On Again. The term is related to the term ROFLMAO, but is used in situations that are even funnier than situations indicated by ROFLMAO. Also it is used as a superlative to make the person that said ROFLMAO laugh even harder, so his/her ass can be laughed on again.

A: ROFLMAO!
B: ROFLMAOABOA!
A: HAHAHA!

ROFLMAOABOA by Hens Venk June 10, 2010