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Post Orgasmic Stupidity. It's when you just had sex and whatever you say you end up feeling like a total idiot because you know none of it makes any sense and you just sound like a retard.
Girl 1: Omg last night I was having the WORST POS...I must have seemed so stupid.
Girl 2: I hate when that happens...
POS by awesomekidd March 14, 2008
Parent Over Shoulder while typing in a chat room.
Tammy is typing to Dohn and her mom walks in and Tammy types POS in the chat room window.
POS by Dave Herberger April 18, 2006
guy1: my POS brother is being a retard again.

x: get rid of this POS phone
POS by chainsawguy200 June 17, 2011
Verb: Derived from Piece Of Shit. Meaning someone dissed you or put you down or made you look bad. Essentially someone made you look like a piece of shit.
Joe POS'd you yesterday at Billy's house. He said you listen to Barry Manilow.
pos by Tojo TS September 30, 2006
It is simply a short version of 'piece of shit.'
Pos by Mizocr7 July 1, 2015
He is a POS for cheating on his girl friend.
POS by Nafia & Zishan June 28, 2018
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