Definition/Meaning of lmfao

• English - Phrase: lmfao (Internet, vulgar) Alternative letter-case form of LMFAO ; may impart a lighter mood to the conversation. c. 2013, social media: Q: What is your attitude towards cannibals?A: like when you jump in the pool? hhahahhaa. umm make a huge splah and ya win the competition lmfao .