And your ass ain't lily-White
That mean that shit you write must be illy
Either that or your flow is silly. It's both!

from Jay Z – What More Can I Say Lyrics on Rap Genius

Meaning

Jay Z has the kind of money that big white entrepreneurs have, in the rap game you can achieve that kind of success only if your rhymes are top notch and/or your flow is fantastic. Guess what? Hova has both!

Lily-White was also the movement by the republican party in the 1800s for anti-civil rights, this could be one of the first times in which Jay added historical background to a line.

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