And if you die you's a buster cause real niggas don't die

from Dr. Dre – A Nigga Witta Gun Lyrics on Rap Genius

Meaning

Eazy-E = certified non-real nigga

This is a reference to the N.W.A song called Real Niggaz Don’t Die from the Niggaz4Life album released a year before the Chronic.
http://www.youtube.com/watch?v=6jy6Nebd_e0

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