Top Definition
Rolling On Floor Laughing my Mother Fucking Ass Off Bar B Que National Aeronautics and Space Administration Federal Bureau of Investigation

"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.
ZOMG! that's freakin hilarious! ROFLMFAOBBQNASAFBI ~!
by Double X September 22, 2008

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