LOL is a stupid, useless "word" that means "Laughing Out Loud", even though you don't usually laugh out loud when you say it. You generally use it in chat conversations, and you look very very stupid if you say it in a real conversation. It's THE thing to say when you have absolutely nothing to say. (sorry for my english ;p)
A: Hi!
B: Hello!
A: How r u ?
B: good n u?
A: great
B: ....
A: Lol
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