Walk up on you
Like "what's going on baby boy?" Shots in that Mercedes door

Meaning

He comes up to you in the street like ‘Whassup man, how you been?’ and then shoots up you and your car.

A simple tactic of deceptive warfare.

To help improve the meaning of these lyrics, visit "The City" by Game (Ft. Kendrick Lamar) Lyrics and leave a comment on the lyrics box