O.G. 

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.

O.G. by Motheryucker April 11, 2016

O G 

O G means original gangsta
those tru gangstas from way back in the day that jacked ya and left nothing but you boxers and socks

Biggie and tupac were both OG's

O G by James White July 10, 2004

o.g 

Stands for Original Gangsta or Original Gangster. But in the movie ''Don't be a menace to south central while drinking your juice in the hood'' it stands for Old Gangster.

You fuckin wiv some real o.g's ya dick tease

o.g by Tha Kronicle May 3, 2005

o.g. 

o.g. : original gangsta

a retired gangster who sits on the porch in the ghetto and preaches to the youngsters.

the o.g. showed me how to keep my own.

o.g. by bob and alpha mu December 19, 1999

O.G 

o.G is short fo Original Gangstao.g

1:look at that o.g aint no 1 cop shit from her
2:i heard she waz an o.g. cuz of her killin a wansta and took his whip to.
1:damn homie u bets ta not get in her wayz then

O.G by Jennifer July 24, 2004

o.g 

Abbreviation of Original Gangsta. First used by Ice T, with his 1991 album "O.G original gangster", and later adopted by gangsta rappers to refer to an old gangster.

Stupid gangsta rapper: I'm THE o.g
Smart underground hip hop artist: No gangsta can be original, they are all the same.

o.g by Shakmaveli June 11, 2010

O.G 

Original gangster, which you are considered to be when you have killed someone

O.G by Mark April 14, 2003