Another way of making yourself look like a bigger idiot on message boards by taking the famous "lol"(laughing out loud) and adding a D to it. Used by people who don't want to say "I laughed hard".
Laughed out loud, in real life. For when you actually, legitimately, do laugh out loud after reading something. Not the pity 'lol' you throw down just to be polite or because you don't know what the fuck else to say.
When I was reading your texts on the bus, I lol'd irl and everyone stared at me like I had mental issues.