Literally Laugh Out Load. It's used when you are texting or on facebook/myspace and you want to show someone that you actually did laugh out loud. To make it simple, llol is a stronger version of lol.
Ryan: Wanna hear a joke?
Andrew: Sure.
Ryan: Two cannibals were eating a clown. What did one cannibal say to the other?
Andrew: What?
Ryan: Does this taste funny to you?
Andrew: llol
normally people just say lol when theres nothing else to say, they're trying to be polite. they're not actually laughing out loud. so when you actually laugh out loud while texting someone or talking online to them, and you laugh out loud, you can use the llol.
-as opposed to lol which means, "laughing out loud" and is frequently used over an internet or text message conversation to ease tension or cover up a lengthy lapse in conversation where you are not actually laughing.