Laugh Out Silent; it's an oxymoron...usually used if you're chatting online at work and something is said, but you don't want to LOL
Both are at work...and the online convo goes like this:

Janice: Tell me why this girl is singing in her cubicle all loud and stuff.
Janice: Thing is she sound a hot mess
Maurice: LOS :-D Tell her to stop
by Pringles July 25, 2005
A slang term for "Laughing out shit", Which means your laughing really hard.
Guy1: LOS, that was sucha good burn!
Guy2: Thanks, I try :P
by Rensen May 13, 2006
Armenians in Armenia believe it is the most powerful place. If you ask one of them they will tell you it is the capital of California, some will say the capital of America. And some believe it is a country on its own. They refer to it as "los" and not Los Angeles. Once they arive at there so called "los" they are dissapointed because it is just a county and it isnt as powerful as they expect.
Dgha Jan Loseets es?
by Garen November 14, 2004
short for loser
You're such a los.
by xocrescendo April 29, 2004

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