look up any word, like cleveland steamer:
 
48.
OG
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
 
1.
OG
Original gangster
someone who has been around, old school gangster
by Levdog February 14, 2004
 
2.
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
by James White July 10, 2004
 
3.
OG
original gangster. Being, or being related to the stereotypical 1970's gangster's lifestyle
OG Loc, Keepin it Gangsta!
by Doctor of the Mix January 30, 2005
 
4.
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.
by bob and alpha mu December 19, 1999
 
5.
OG
Jay-Z's imaginary friend.
Catch me at the X with OG at a Yankee game.
by Tikibarberfan March 06, 2010
 
6.
o g
the original gangsterz from the hood way back.
NOT GAME, 50 CENT OR G-UNIT.

OG is refering to the pioneers of gangster rap who were in it since the beginning such as Dr Dre, Ice Cube and the late Eazy-E (RIP)
"I stab it like a true no good nigga
should,I do it the way a down OG nigga would" - Eazy E; "still a nigga"
by Narvin Singh Sondh aka Slick Singh December 31, 2005
 
7.
OG
Orangutan Ganja - Really strong weed that Asian Orangutans smoked with Budda. Now used as a marketing term universal adjective that has largely lost its original meaning. Used to describe strong weed (i.e., OG Kush, OG Sativa, OG Indica, etc.).
Hey, I got some OG at the dispensary.
This stuff is real Orangutan Ganja.
by Jack Meough March 15, 2010