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90s Slang You Should Know

LMAO

1.
laughing my ass off; laughed my ass off.
Origin of LMAO
from its use in digital communications
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Word Origin and History for LMAO

by 1997, online abbreviation of laughing my ass off. Related: LMFAO (by 2000).

Online Etymology Dictionary, © 2010 Douglas Harper
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