O g

[Sarah]

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

[Tina]

the original gangsterz from the hood way back.
NOT GAME, 50 CENT OR G-UNIT.
OG is refering to the pioneers of gangster rap who were in it since the beginning such as Dr Dre, Ice Cube and the late Eazy-E (RIP)