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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A cop. If you are doing something illegal , or something the cops might think is illegal, yell this to get your friends a head up and scatter the fuck out. ( if you are too intoxicated to tell if you are doing something illegal, just yell 5-0 anyway.

rules for this word,
1- dont say it unless the cops are there,
2- if the cops are at the cars, yell SHIT 5-0 AT THE CARS HIT THE WOODS!!
3- if you are black, you really need to run, in fact, try a hommie so you dont get caught, cause cops love to beat black asses.
SHIT! 5 0 5 0 Run for your lives, and get that dime pack for they see it!

50 at the cars!!! SHIT run for your lives!

FUCK!!!!!! 5 0!!! hit the deck!

by Gangsta Stoner January 31, 2008
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cops, skateboardling grind where only the back truck grinds and the front is in the air
Dude, I was trying a 5-0 on that ledge but the 5-0 came and kicked us out
by chris March 18, 2003
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a cop ;
Ya'll kids put your seatbelts on, there is The 5-0.
by loveyounot February 5, 2016
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