I take a sip of Hennessy and then get pissy drunk
I ain't a drinker, I'm a thinker, call it what you want

from Kendrick Lamar (Ft. BJ The Chicago Kid & Punch) – Faith Lyrics 2 on Rap Genius

Meaning

Kendrick’s not drinking just for the sake of it, he’s drinking to get into a state to think. An obvious contrast to the concept of faith and holiness, or at least that’s what I call it.

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