Like I'm walking round with money on my mind all the time

from J. Cole (Ft. Major Lazer) – Get Free Coleworld Lyrics on Rap Genius

Meaning

People think that because Cole is a rapper, all he cares about is money. Cole is trying to emphasize that he’s a man with morals.
http://www.youtube.com/watch?v=AnR5w9hYcd0

The word “dimes” in the previous line also serves as a double entendre representing a dime as in a chick thats a solid ten and the physical money.

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