Who knew I be peddling a six-speed white
Big dog through the yard where the little dog's bite
So if you are a female dog you don't fight
Bitch ass nigga I ain't got no master
Rich ass nigga I got all my masters

from Kanye West (Ft. Jay Z & Lil Wayne) – Flashing Lights (Remix) Lyrics on Rap Genius

Meaning

He has no masters to answer to, yet he owns all of the master copies of his songs. Something only label execs usually have access to. Thus, making him a big deal

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