ROTFLMFAOSHTIDMTNYOMAT

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 May 9, 2012