You know, anybody that uses somebody else to gain is pimpin'
Well, I tell you what soul brother, lookie here
Can't nobody pimp you but your pimp ass self
You understand?

from BJ The Chicago Kid (Ft. Kendrick Lamar) – The World is a Ghetto on Rap Genius

Meaning

Taking advantage of others for personal gain is the equivalent of pimping, or taking what someone else has worked for. No one should take advantage of you except you.

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