a word used in text messages or AIM, yahoo, etc...meaning "laughing out loud" It was actually so overused that many people in our modern society decided to migrate from that word to haha. Saying lol to someone is just a way to stop a conversation when you have nothing to say. It's also a way to make the other person feel like they're fun to be around with their "great sense of humor" and all... If people actually DID laugh out loud, they'd come out and say "i just laughed for real"
JackFTW: Dude I was walking down a street today and then I blinked and all of a sudden I forgot what happened, it was soooooo weird, dude.
Jane74: OMG! GUESS WHAT!! I got these AMAZING SUNGLASSES that are like huge, you don't even know!!
Jane74: Did you read my message?
Jasper8D: Can I confide in you my deepest secrets? I don't know who else I can tell..