So, BRRRAK, lick a shot for, BRRRACK Obama, change gon' come or

from Jay Z – A Billi Lyrics on Rap Genius

Meaning

The way Jay says this it’s an adlib of a gun sound, but lick a shot also (liquor shot) aka celebration, toast for President Obama. “Change gon' come” word to Sam Cook, also Change was President Obama’s campaign slogan.

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