Lol

An indicator that someone is obtusely and severely mentally ill, deluded, incompetent or ditzy. Such persons derive a thrill from insulting people on usenet and message boards, then using "Lol" to lighten the mood, abeit in a pseudo way. When they really want to hurt their intended victim, they pull out a "LOL", "ROFLMAO", "LMAO" or "ha ha".

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Taylor: Hey everyone! Listen to me singing "Maria" from West Side Story!
Nate: WTF! Horrible! You're a troll! This isn't the way to get us to accept you. What did you think you would accomplish by posting that?
Taylor: I wanted people to hear me sing..
Defender of Taylor: Nate, I really think that was harsh.
Nate: Lol
Taylor: What's so funny?
Nate: I was just trying to lighten the mood! Because that's me!
Taylor: Is that your story now?