Flip
This crack into rap music every other zip is a track
Get used to it, get it off quick

from Schoolboy Q (Ft. Kendrick Lamar) – Blessed Lyrics on Rap Genius

Referencing the long-established metaphor between the crack and rap game. Just like a king pin distinguishes himself by moving ziplock baggies of crack, a rapper will ultimately be defined by the units he moves

He is also encouraging his friend to pursue a rapping career instead of a life as a gangbanger. A “flip” is a quick exchange, so Kendrick is encouraging him to give up his life as a crack dealer to make rap.

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