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3. five-o
although it does come from hawaii 5-0, my undestanding is that it specified undercover officers, or detectives
Yo, you think he's five-o? wait til he leaves before you light that shit.
1. five-o
n. Short for police officers. Originated from the TV show Hawaii 5-0 which was a copp show in the 1970's. Hawaii is the 50th state, hence the nickname "5-0".
Put that blunt out, five-o, five-o!
by thug4life Sep 29, 2002 add a video
2. five-o
Urban slang for police officers. Derived from the police drama "Hawaii 5-0."
Five-O is following us, and we've got six bags of crack in the trunk. Damn, we're doomed.
by GuidoPosse69 Feb 8, 2005 add a video
4. Five-o
Pigs -- sometimes hair-trigger killers with screamin' amps, party lights and big guns (the bad kind of each) anywhere, but specifically on any of the Hawaiian Islands.

Generally: anyone, anywhere packin' a badge or talkin' to someone who does; Cops; LVPD on bicycles; LAPD; NYPD; Sheriff's Deputy; CHiPs; Highway Patrol; State Police; Texas Ranger; feds; U.S. Marshall; DEA; BATF; undercover detective; the man; gubbamint agent; revenuer; Dog the Bounty Hunter
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5. Five-O
A term used for police. Usually when the person is doing something wrong or illegal.

police pigs
Shit! Run! The Five-O are coming! Hide the drugs!
6. five-o
a dance that involves five people
Shit son that was a great five-o!
7. Five-O
Meaning Police
Originated from New York
Mr Cahill, you like a God to me.
Like a god. Son I am God. God, Allah, Buddha all rolled up into one big Nigga.

Five-O.
Motherfucker got more shit on me, put me away for 20 or 30 years. That's why I gotta pay them so much money.
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