OG 

Jay-Z's imaginary friend.

Catch me at the X with OG at a Yankee game.

OG by Tikibarberfan March 6, 2010

OG 

The original. Genuine, not a copy.

My uncle just bought an OG Shelby Cobra.

OG by harlw August 4, 2016

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.

OG by JackMeough March 15, 2010

OG 

Cool, awesome, da best.

A wise leader and mentor who has life experience and passes it down to a few lucky individuals who are worthy.

Our boss Girija is a real OG. She helped me get my life together after college.

OG by A DCAC OG September 6, 2019

OG 

Your mother or women caregiver

I swear on my OG cuz
Put respect on my OG name blood

OG by IAintNoOppNigga October 29, 2016

OG 

Stands for "Original Gangster".

That girl Casey is an OG right there!

OG by C-swizzle fo shizzle November 7, 2010

OG 

original gangster. Being, or being related to the stereotypical 1970's gangster's lifestyle

OG Loc, Keepin it Gangsta!

OG by Doctor of the Mix January 30, 2005