This is teenage Instant Messaging slang meaning "Parent Over Shoulder". It tells the other user the their mother/father is standing over them, and to not say anything that might get them into trouble.
Girl 1: LYKE OMG TYLE IS LYKE DA HOTEST GUY IN DA HOLE WORLD!!!!1!1
Girl 2: P.O.S.
Girl 1: can u help me wid my english hw?
Girl 2: sure, wat pg is on?
....
Girl 2: KK, hes gone
Girl 1: I can tell tyler wants meh, he wus starin at meh b00bs in eenglish class...
by Resa May 19, 2006
POS
Point of Sale.
Used at Stores to refer to something that happens at the cash register.
Please offer the Customer Something at POS
by ERik February 20, 2005
Teen instant-messaging slang for 'parent over shoulder'.
Janey> smoked much today?
Julie> you kiddin? wouldn't touch the stuff
Julie> pos
by Anonymous July 03, 2003
a great emcee off the lable Doomtree. P.O.S. stands for many things such as pissed off stef, Product Of Society, Promise Of Stress, Promise Of Skill,
My name is promise of stress skill (p.o.s.)
I rep the midwest still...
by hetzler November 24, 2006
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