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rolling on the floor laughing (my ass off)and ROTFL(MAO)
phr. & comp. abb. a description of how hard someone is laughing at someone else’s comments. (Usually objectionable.) ROTFLMAO! Gee, that was funny!
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.