O.G is what T.I. is.. and hes like real hot too but thats besides the point.. O.G means Original Gangsta and ya aint no O.G if ya dont even kno wut one means so iight dont pose to be one biatch!! fake ass wannabes..
"I graduated frum da streets imma real O.G"
"Dat nigga tryna act like an O.G when he kno he as white as my.."