Quietly Laughing To Myself.
A more politically correct term compared to LOL, LMAO, or ROFL. Usually used over messaging systems (ex texting or instant messsaging) as a term to show a realistic emotion.
Person 1: Dude I tripped over the curb today
Person 2:QLTM Thats funny
Quietly laughing to myself
Instead of saying LOL say Qltm because youre not really laughing