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1.
This acronym has two meaning:
1.Laughing her ass off
2.Laughing his ass off
This can be used when writing fanfiction or describing someone in 3rd person.
girl:I told Jane that joke this morning and she was lhao.
boy:I told John the same joke and he was lhao until tears came out of his eyes.
by Ryoko January 14, 2006