Astronauts hover throughout the atmosphere, that the ghetto burb
When Kendrick says “Burb” he is referring to the “Suburbs”.
Basically what this line means is the police are watching over you at all times. He is also saying it’s the “Ghetto Burb” meaning that they are living in the Compton, which isn’t “Ghetto” but isn’t “Burb” either. A median.
It may also be a reference to Joe Budden’s song “Ghetto Burb”
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