Roll mob deep, guns in the black Jeep
Mac-11's and legends, cracks in the streets
Patroller, gold money-folder, gun happy soldiers
Never sober takin over,

from Nas – One on One Lyrics on Rap Genius

Meaning

Nas bringing his trademark vivid imagery! More drugs, gangs, violence, dirty money and illegal/dangerous/negative activity polluting the streets.

Gang leaders and their cronies patrol the streets with the threat of violence and drugs. Drugs consuming and destroying their lives. While trigger happy soldiers are around that are bound to run into gangs. It´s like a battlefield and you drink to get by for to day: “never sober takin over” could refer to:

In this clip from the movie Boyz n the Hood it´s explained a big reason why they are always drunk:
http://www.youtube.com/watch?v=r2ECcFN8uqg

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