Top Definition
It stands for "Rolling On The Floor Laughing My Fucking Ass Off So Hard That I Dropped My Taco Now You Owe Me A Taco."

Also used as a more expressive way of saying "LOL."
Person 1: "ROTFLMFAOSHTIDMTNYOMAT!"
Person 2: "GRTAURTHAKJGNGNAKNYAAOYALFNGLAT!"
Person 1: "At least mine means something."
by Erik McLovin February 24, 2012

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