Most commonly used to refer to Police Officers/detectives or anyone associated with law enforcement. Origins date back to an early 1970’s television series titled “Hawaii Five O”. Detectives on this show were assigned to a special unit (Five O) and were savvy, aggressive and always apprehended the suspect. Much like the character “Daisy Duke” from the Dukes of Hazard television series whose short shorts spawned a once popular clothing trend with women very effeminate men, the term 5 0 too has transcended television to urban slang.
1. Say man. The block is hot so we goin to post up at Man Man’s cause 5 0 ain’t lettin a mother fucker make no mony here.
2. 5 0 came and took my baby daddy cause his P.O say he had weed in his pee and he on paper.
by a.g.c. June 3, 2007
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"Police"

A term deriving from when Police cruisers had a 5.0 liter engine.
"Run nigga here comes the 5-0!"
by Brandon Fandel October 9, 2007
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Oh No! 5-0! Get the fcuk out of ere! Run!
by Doug December 3, 2004
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slang for police, originated from the TV show "hawaii five-0" (apparently a show about cops)
"5-0 at the do, gotta go" -cradle to the grave
by chris January 2, 2004
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Term commonly used to quickly alert a house full of underage, intoxicated party goers that the cops have showed up and to exit the property via the back fence, or to let your crazed friend driving to know a cop is around and to slow it down.
Oh crap man, 5-0 hide the weed, quick drink the rest of the keg.
by ImportDayz December 24, 2002
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the police, cops, FBI what ever. the person who comes to bust you
by matt March 12, 2004
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