Define 5-o Meaning

5-0 became a slang term for law enforcement (aka police) after the hit show "Hawaii Five-O". The show was centered around a fictional division inside the State-Police of Hawaii and carried the same name as the television show ("Hawaii Five-0". The division's name gets its origin from honoring the fact that Hawaii was the 50th state to become apart of the United States of America.
On a side note, the division was actually called "Hawaii Five-0" (as in Zero, no the letter "o") but IMDB has the show listed with the letter "o" in the tittle.

5-O goes back even further than California late 80's. It's origins are a reference to an old 70's TV show called Hawaii 5-0 starring Jack Lord. The police were 5-O and eventually the show lingo caught on as hip among petty criminals in southern California.

police, the cops, po po

5-O, commonly written as 5’O, 5’0, 5-O, 5-0 is a slang term used by a lookout committing a crime with a group to signal that officers of law enforcement are arriving. It is commonly used by skaters who skate in groups to tell everyone to scatter.

5-O pronounced as five-Oh is the combination of the number 5 and the number zero which throughout time has been pronounced as “oh” (O). It originated from the 1968 police tv show “Hawaii 5-0” where the 5 and 0 represent the fact that Hawaii was the 50th state.

a patrol car.

Orgin: late 80's Cali.

back then all police cars at one time where Mustangs, 5.0 engine model, on the front and side of the car it read in chrome letters the engine model. 5.0.

it refers to the car they patrol in.

now it also refers to the police officer himself.

These are cops. If you hear someone screaming "Oh shii, it's the 5-O", get your ass up and moving nigga!!

A patrol car. Back then all cops in parts of the California district drove 5.0 engine Mustangs.

The police. 5-O is the type of engine that police cars use.

when you're doing something you're not supposed to be doing and someone yells 5'0 that means they're giving you a warning because you're going to get caught

An extremely cheap, pretty harsh vodka. Usually the cheapest you can find, stands for 5 - o clock.