OG used to mean Original Gangster allthough some poeple these days use OG as a quicker way of saying Original

The abbreviation of "original ganster", a term overused by SGs or studio gangsters and millions of people that have never done anything gangsterlike in their life. It no longer a means anything.

OG stands for "Original"

Short for "Original username". Any cool name on social media is considered an OG.

O G means original gangsta
those tru gangstas from way back in the day that jacked ya and left nothing but you boxers and socks

Olive Garden waiters can be intimidating and judgemental. The gangster community just took it over and used it as "original gangster" retro-actively.

Jay-Z's imaginary friend.