The term LOL , which means Laugh out Loud often used in instant messaging like Yahoo!Messenger, Windows Live, and the likes. It's suppose to tell your friends that you laughed at what they said.
A : Yo momma's so fat, when she walk in front of the TV, I missed the whole marathon
B : LOL !
Cathy : I think I just saw you in a salon the other day.
John : LOL. I don't =)
But these days, people often misused the term. One that I observed was
D : My cat died today.
E : lol
Gigi : I just got fired. Now I don't have a job.
Gaga : Lol.
Now that's a LOL =)