OG 

What chicago niggas call their momma.

"Damn, homie I can't even come, my OG fucked up right now at the hospital."
"I ain't talk to my OG in a minute."
"On my OG grave you playing way too much."

OG by Juicy_Jay November 26, 2019

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

OG by Tired of fake OGs July 22, 2009

OG 

What kids call themselves on Fortnite when they have rare stuff and then write a 12 page essay in the comments when their skin comes back

EPIC GAMES: *releases skin*
“OG” *furiously typing* my frind actally killd himself bc you didn’t ad an og stile!!1!1!

OG by WhoWantsCoffee? December 23, 2018

og 

An OG is someone who's been around long enough to know a few things about the matters of life.

A teenager says "You don't know what i'm talking about. The matured adult says "I know all about it, I'm an OG."

og by MBNZO May 30, 2006

OG 

noun
1) original gangster
2) original

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.

OG by randomvs September 4, 2005

OG 

1. An Original Gangster that has been around a long time. An old school gangster, often with lots of experience and lessons learned.

2. In music lingo, OG means, an Original Version of a song that was recorded. Ergo, based on the the Master version. Often times confused with an OG Vibe track.

1.

P1:Who does that guy think he is? he has turned soft. This is our time to shine we taking over.

P2: Give that dude some respect, he is an OG, you can learn a lot from him if you listen and learn. Don't become another statistic.

2.

P1: Yes!! I finally found the OG version to this song all these producers keep screwing up.

P2: Nice, let me get that on my ipod.

OG by Don NY631 September 12, 2009

OG 

In the street it stands for "Original Gangsta"

"Aye my homie Vic is the OG"

OG by ArcheryQueen January 31, 2018