You renting jewels what's with all the fascination?
So when I ask you 'bout it that's my cross examination

from Joe Budden – Lost Control (Freestyle) Lyrics on Rap Genius

Meaning

A lot of rappers rent all of their jewelry, or cop fake shit cause they aren’t actually earning what they claim in their songs, thus can’t afford the real shit. Cross examining is a law term which means to question the witness, so when he “asks about it” that’s his “cross examination”, and the “cross” (necklace) is also what he’s questioning.

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