Lmaoing Posted in L Best definition Lmaoing The act of actively laughing your ass off He was too funny I was LMAOing ! Lmaoing: define #2 Lmaoing The act of Laughing Your Ass Off. I was Lmaoing when girlfriend tried to prove me wrong How satisfied are you with the definition? Looking for Lmaoing meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 15 times.