Another gay instant messenger abbreviation created by losers with no life. Means "parent over shoulder." Used to tell the other person that your mom/dad is looking so don't type anything you wouldn't want them to see.
ChEeRcHiCk289: omg lyk u no who is lyk so hott?
SeXiPriNcEsS542: pos
ChEeRcHiCk289: um....what is our math homework
SeXiPriNcEsS: ok he left
ChEeRcHiCk289: oMg! josh is soOo hott and i gave him head yesterday because im a slutty little cheerleader!
by Asshole November 08, 2003
aim slang for Parent over Shoulder
aim conversation:

weedhead96: oh hey whats we gnna go smke tht joint tonight
mothers_little_angle: wait u mean go start a forest fire?
p o s/ p o s/ p o s
weedhead96: oh yea thts what i ment my finger slipid on the keybored
by imAnubis December 25, 2007
Despite popular belief, it does NOT mean parent over shoulder (anyone who thought that obviously hasn't found the minimize button; you know, the button that hides shit). It does however, mean Piece of Shit.
My car is such a PoS
by qblastphemy August 01, 2009
piece of shit.
guy1: my POS brother is being a retard again.

x: get rid of this POS phone
by chainsawguy200 June 17, 2011
Piece of shit.
Congratulations Pantech for creating the Matrix. A truly POS cellphone with a standby battery-life shorter than Britney's first marriage.
by F*ck Pantech December 04, 2009
Acronym for the band "Pain of Salvation". Usually used in a sentence to compare the overall greatness of the band over any other band out there. The band is characterized in having more well thought lyrics, concepts, music, albums, than the crap (only by comparison) you listen to.
PoS totally rapes Sonata Arctica in all aspects.
by BlindPanzer January 13, 2007
P.O.S. or POS ~ A more subtle way of calling someone a "piece of shit".
"Wow, that customer was a P.O.S."
"Stop being such a POS!"
by squirple June 18, 2013
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