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1. Original Gangster, a criminal that has been around for a long time

2. Online Gangster, a pathetic 14 year old (presumably white) that pretends to be a gangster while posting to rap videos on youtube.com or "battles" on internet hip-hop boards. Synonymous of Wigger and an antonym of def. 1
1. Ice-T has an album and a song named O.G. Original Gangster. A real OG

2. "Fuck da Eaztside! We be keepin it poppin' west coast style! I kill 'em bitches for fun!" - random 14 year old kid from Wyoming. I.e. a fake OG
by Tired of fake OGs July 16, 2009
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23
T.I. "I graduated at the streets, i'm a real OG!"
by gboi92 November 30, 2007
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24
Original Gangsta; the real-life definition of a street-level mentality; no remorse or concessions for a person's (or group's) behavior associated with violence, sex and crime. A way of life, of sorts, that doesn't provide explanations or apologies because this is the "reality" of aforementioned subjects. The rapper Ice-T coined this term globally with one of the defining albums of gangsta rap, O.G. Original Gangsta. O.G. can also apply to a first generation item or family name, i.e. George H.W. Bush = "O.G. Bush"
"Straight OG out of Compton with a loose cannon, smoke big green call it Bruce Banner"
by J_Nasty April 16, 2009
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25
The abbreviation of "original ganster", a term overused by SGs or studio gangsters and millions of people that have never done anything gangsterlike in their life. It no longer a means anything.
Alex:"can I get a discount, I'm a OG, nigga" Cashier: "you're about as OG as Drake ya yesmaster ass nigga, get the fuck out my shop hood rat" O.G.
by Motheryucker April 11, 2016
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26
1) My bro used to roll with the real OGs 'fore he got locked up. Fought old school, knucks and chains.
2) Damn, i didnt know you're pops was in the OG Guns N Roses.
by randomvs August 10, 2005
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27
This peculiar word can be used to describe a "hard" playa from the streets who is pimped out and smooth. O G stands for Old Gangsta or Original Gangsta.
"I keep it real on the streets, I'm a real O.G."
-T.I.
by Fuck Nigga June 05, 2005
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28
yo man muda fuka snoop dawgggg be dem best og eva
by muda fuka February 17, 2007
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