They want that shit, they often fiend, I give it to 'em, but in between
My time,

from Kendrick Lamar (Ft. Dr. Dre) – The Recipe Lyrics on Rap Genius

Meaning

People want to hear Kendrick’s music, (his shit), and people fiend for it like it is a drug. So he gives it to them but on his own time.

He could also be playing on the phrase “read between the lines”, which is what you frequently have to do when deciphering Kendrick’s verses which have lots of hidden meanings and symbolisms.

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