phr. & comp. abb. a description of how hard someone is laughing at someone else's comments. (Usually objectionable.) : ROTFLMAO! Gee, that was funny!
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Slang Dictionary
RO(T)F(L)
interj. rolling on the floor laughing. (Used in electronic mail and computer forum or news group messages. Not pronounced aloud.) : I was ROTFL when I read your note. That was too much.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Computing Dictionary
ROTFLchat Rolling on the floor laughing (or rolls...). Used in a MUD, news. See also ROTFLMAO, ROTFLOL. (1996-02-22)