ITTWABIWNSTAMMLOL
Stands for: "I thought that was amusing but it was not sufficient to actually make me laugh out loud". Way more accurate than "lol", because let's face it, how many times do you actually laugh out loud when you say that?
"I saw some old lady fall down the stairs today."
"ITTWABIWNSTAMMLOL"
"ITTWABIWNSTAMMLOL"