o.g.

1.Abbreviation for the pseudonym 'Opera Ghost,' as used in the novel "The Phantom of the Opera."

2. Abbreviation for the tag name 'Original Gangster.'

1. 'Your obediant servant, O.G.'

2. Jamal is a true O.G., he fucked up some people in his day.

by Polythene Pam November 06, 2003