OG

Original Gangster Or Oriental Gangster.

Wow, that guy is OG!

by KyleTEG June 29, 2015

OG

Original Greg (Nance). It used to mean Original Gangsta, but that meaning is slowly being phased out.

That greg nance is OG.

by truthspeaker505905 May 21, 2011

OG

Original Gansta
Or
Ol' Girl
Which means your mom.

Ice T is an OG

Ma OG keep calling me, damn, I think she found out I got an F on my exam.

by DamnIt69 May 11, 2010

OG

Organically Grown.

Food grown and processed using no synthetic fertilizers or pesticides.

"Organic Dark Chocolate (OG cacao beans)"

by Freak Nasty B September 22, 2008

OG

A pimp; A high chief; One who answers to noone else.
Derived from the 6th century word for an occupier of Ogham's Hill in what is now modern day Wales.

Dude, did you see Smitty meet and walk off with that chick in like three minutes of talking to her? What a fucking OG.

by Shnoop July 25, 2004

OG

Original Guido (Jersey Shore)

Damn that guy fist pumps like an OG

by Baamzz January 18, 2011

OG

overgrow forums @ www.overgrow.com

marijuana is awesome, i love OG 's forums

by Mike Girard April 26, 2003