LMAO Full Form is Laughing My Ass Off
LMAO meaning Laughing My Ass Off. LMAO is the chat slang used while wiring conversation and chatting with friends. It is used when something is funny happened. But is not commonly used because this can be misinterpreted by someone on the other side. It is mostly used instead of LOL (Laughing Out Loud) and it is harder than LOL.
Some people think that it is used for insult Lame-o it means that pathetic person.