rotflmfao 

Rolling On The Floor Laughing My Fucking Ass Off. Cyberchat. One states something really funny and the other(s) reply with ROTFLMFAO

User1: There once was a man from Nantucket...

User2: ROTFLMFAO

rotflmfao by Philism January 28, 2003

ROTFLMFAO 

rolling on the floor laughing my fucking ass off

usually used in internet interaction, when someone says something funny.

Person 1:
I don't have to spellcheck eevrything

Person 2:
ROTFLMFAO

ROTFLMFAO by tim December 29, 2002

rotflmfao 

rolling on the floor laughing my fucking ass off

commonly used on cell phones and msn

Guy 1:DUDE MY DOG JUST TOOK A SHIT ON THE FLOOR!!!
Guy 2:ROTFLMFAO

rotflmfao by 15marsht January 22, 2009

ROTFLMFAO 

Stands for rolling on the floor laughing my fucking ass off. Also known as post '04 election syndrome.

Everytime I think of that guy outside the Columbus, Ohio Victory '04 Bush tour stop, I'm ROTFLMFAO at how he kept chanting "Four more days."

ROTFLMFAO by Nikthenyetminder November 17, 2004

ROTFLMFAO 

Rolling on the floor laughing my fucking ass off

That movie i saw yesterday made me ROTFLMFAO

ROTFLMFAO by Conan Edigawa October 30, 2008

ROTFLMFAO 

Rolling on the floor laughing my fucking ass off.

XSefiros: that kid is a flaming homosexual....=|
Luca_Goers: ROTFLMFAO!

ROTFLMFAO by XSefiros August 10, 2003

rotflmfao 

1. an acronym used by supergeeks in order to express approval of comments or anecdotes or to acknowledge a humorous occurrence, usually typed in chatrooms or during online gaming.
2. A sure-fire indication that one will never be laid by a woman you don't pay for.

"hhhmmmhey...I mega-fragged OCClanSuPerPain039 when he tried to grab the flag...ROTFLMFAO....glavin...hhmhey"

rotflmfao by John Cocktoastin January 28, 2003