Being half of 100, not loyal or trusting
Drew: aye I heard yo girl fucked another dude.

Daniel: yeah son, she so 50 for that.
by DmvSlang May 12, 2014

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It's usage first became popular in a television show called Hawaii 5-0.......they were the bureau that investigated homicides and when you called the main telephone number for Honolulu police you would ask for extension 50.....5-0.
Hi, I'm detective Williams can you connect me to extension 5-0?....I am working on a homicide and need to speak to a detective there.
by we_are_anecdotal March 13, 2016

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a cop (a.k.a. pig) a cop car 2
oh shit dawg da 5-0 grab the meth and run like hell
by Tray October 18, 2003

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Can mean 2 things in the Bay Area: one, can signify cops, police etc. two: can signify the 1984 to 1991 ford mustang 5.0 nicknamed 50 (fifty) mostly used as a sideshow car or a cheap getaway car when pulling licks.
Example one: Shit we got 50 following us!!
Example two: That nigga big murf's 50 go dumb at the sideshows whaa!!!
by BayBosses707 September 04, 2008

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its wat street racers frm america call the police
guy#1:oh shit!!!!!!!!!
guy#2:wat???
guy#1:its da 5-0!!!!
by MattyD900 March 04, 2008

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When you are fucking a girl, preferably from behind, and then you yell "oh shit, the cops" and then your friends come in and beat the shit out of her as you finish with your hands.
Person 1: I gave my bitch the 5-0 yesterday
Person 2: Oh shit, why wasn't I there
Person 1: I already had like 20 guys sorry bro
Person 2: It's fine brah
by Paenus the Roman Warrior February 20, 2014

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Slang for Police. This term originated in the Bronx circa 1980 where the local police station was/is the 50th precinct.
Yo, 5-0, keep'im low.
by tigerturnedlion May 07, 2011

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