POS on is used when there is a PARENT OVER SHOULDER watching what u say and it is a warning sign to your friend online that they should watch what they say.
POS off is used when there is no longer a parent over your shoulder.
Mark: wtf are you talking bout?
Mary: POS ON
Mark: yeah i did watch the new episode of family guy :)
Mary: yeah it was hilarious
Mary: POS OFF
Mark: okay anyways..back to topic..wtf were u thinking?
by VieiraC April 10, 2009
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the police

originated in california where bycycle mounted cops travel around in sets of two. they wear vests with giant POs written on them. thus the name po-po originated
by senile q May 25, 2005
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My boy Nee-Nee got picked up by the po-po, he had a warrant for unpaid tickets and we trying to get err'body to pitch in for bail.
by faprowsdower October 5, 2015
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the cops. if you hear some one yell the po-po's comein RUN!!!!!
by biscuit bega January 1, 2006
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The police. You usually say this when running from the police.
Oh shit! The po pos are after me!
by iAculate May 26, 2009
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Stands for the Police

Everyone hates the cops until someone steals your car see would Jesus microwave a burrito?
pothead 1:"Man, the po po be a bunch a losers"
pothead 2:"Dude, someones stealing your car!"
pothead 1:"Shit man, call the police!"
by USSR December 11, 2003
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