No C.O., but I control the pen

from CZARFACE (Ft. Action Bronson) – It's Raw Lyrics on Rap Genius

Meaning

Correctional Officers aka C.O.’s supervise and control the safety of the “Pen” (slang for prison or penitentiary). Esoteric isn’t a C.O. but he controls the pen that he uses to jot down his rhymes.

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