After ten seconds of staring, Alias realized that the l in lmao was in fact a lowercase L and not an uppercase I, and the acronym suddenly made a great deal more sense.
Dont feel bad. In a chatroom it was months before I learned what AFK meant. I had assumed it meant "Aw (something obscene)" because whenever anyone said AFK and rushed off, my assumption seemed to fit. Like "AFK.. kid broke a glass" or "AFK.. dog is sitting on the cat".