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