Grinding hard, burning up at least one nine
For niggas on the grind and the ones popping off shots from their nine. “Burning” means to empty a clip, hence the smoking barrel effect when all shots have been fired. The “nine” is a 9mm pistol.
To help improve the meaning of these lyrics, visit "Fuck Da City Up" by T.I. (Ft. Jeezy) Lyrics and leave a comment on the lyrics box