What does LMMFAO mean? LMMFAO Definition. Meaning of
Aug 05, 2010 · LMMFAO: [interjection] acronym for "laughing my mother fucking ass off". LMMFAO ! I can't believe you just did that. See more words with the same meaning: Internet, texting, SMS, email, chat acronyms (list of) . See more words with the same meaning: to laugh .
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