OG 

Old Gangster- any ganster that has killed before

OG is hard to classify, so out of context it is hard to place

OG by sher September 25, 2003

OG 

"OG" Stands for Original Generation.

The OG's of Poplockin' (Popping and Locking) was Boogaloo Sam and the EB's.

OG by Michael Hsu aka Poppin' Rice January 24, 2005

OG 

Stands for "Original Gangster".

Someone who is awesome, legit, amazing, etc.

Someone who has an awesome personality and it considered "cool".

That girl Casey is a total "OG"!

OG by C-swizzle fo shizzle November 8, 2010

og 

Original Grill,
what all the gangsta harveys employees represent fo life; Another name for Harveys, cause of a gay marketing idea.

p1: yo Cody you workin at og tonight?
p2: fo real dawg im reppin da og till i die.. well untill close.

og by lil wyte February 2, 2005

og 

Funny antics. Got it's start in a Star Trek chatroom.

SCS: *Dances around to Cats in the Cradle
Loc: *Sings loudly
Kronos_One: I'm glad I'm here to see the og.

og by ValVal October 13, 2006

OG 

a touch, a feeling, a name
-my love
original girlfriend!

when u see a girl so beautiful that touches your heart then or when your have an sexual intercourse only one word comes

oh god!
shortly og,

OG by bulu May 31, 2007

OG 

"Overly Gorgeous" ,Originally Gaga factor x 10, Va va va voom, Easy to like

OG shouldn't be used to refer to your mom or any other person over the AGE of 30. It is a slang term that arose in the suburbs of Florida. It can easily be used in everyday conversation. It should be taken as a compliment.

Maggie your like so OG right now - its not even funny.
Maggie replies: Victoria Secret Beauty couldn't even beat that!

OG by Ms. Stephers Magilicious July 29, 2007