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3.
An extension of the popular internet and text messaging acronym 'lol', the difference being when the 'lol' is aimed at something, or someone, in particular, and not necessarily as a general amusement to the conversation.
Person 1: I got a bad mark at my maths mock yesterday. Didn't care - got a crap teacher anyway.
Person 2: Lol@Mr Garrison!
by xmaramena February 12, 2012
 
1.
Laughing out loud at ...

Generally used when not actually laughing out loud and just pointing out something funny, or making fun of something.
LOL @ Greg, he smells.
LOL @ u suck at life.
LOL @ green poo.
LOL @ LOL @.
by jadamcmiles November 23, 2006
 
2.
LOL = Laughing Out Loud
@ = At

So Lol@ Is Laughing At Someone/Something Funny
Jon: Dude That Pinguin Fell On His Ass
Bob: LOL@ HIM
Jon: LOL
by PEWPEWWW December 14, 2007