An abbreviation meaning Laughing To Myself Quietly
IM user 1: HAHA I can tell funneh jokes!
IM user 2: LTMQ i kno!
Laughing to Myself Quietly
For use in texting and the like when you are not actually laughing out loud or laughing your ass off. Props to Demetri Martin for pioneering the phrase.
Harold tells a story that is funny but not that funny via AIM.
Louis replies "ltmq"