OG 

In the 1970s, "O.G." was used to mean "Old Gal". In other words, "yo mama", which could -- of course -- have referred to your actual mama, or your wife, or your main squeeze.

"Hey man, how's yo' O.G. feel about you stayin' out late tonight?"

OG by RadioGeno July 7, 2005

og 

OG: Someone who registered on OT in either 2000 or 2001 would be called an Original Gangster.

Mike: Wow, you're really an OG?

Bill: Ya rly.

Mike: Can I be an OG too?

Bill: No. OG doesn't mean "Been here a while gangster".

og by BobnNeal August 2, 2006

OG 

oriental gangster
*of the asian kind*

did you see Lisa Chen the other day? she's such an OG

OG by k.....t January 9, 2008

OG 

Overly Gay

Someone that Over usess OG and names them self an OG.
OG can only be given to someone by a group of people that are thier peers.

That gamer can't be an OG he named him self an og and he is less then 30 years old maybe he is an OG - Overly Gay

OG by HotShotKev February 21, 2014

OG 

Orange juice.

Hey Alex, can you grab me some OG?

OG by wannabeaballershotcaller June 16, 2016

OG 

OH GOD or Original Gangster???

What you scream during sexual intercourse

OG by Your mom February 4, 2005

OG 

an overly groomed male. a typical metrosexual. eyebrows waxed, pressed clothes, overly tanned, clean shaven, perfect hair. a tool.

omg look!! that guy over there is a real OG...ew!

OG by laurness January 17, 2010