I'm tryin' to make a dollar out of fifteen cents
A popular phrase in rap music for get-rich schemes (even used as the title of a Master P song), usually illegal, and almost always referring to selling crack cocaine. The crack epidemic, which spread across the United States from West to the East, but first settled and become an epidemic in NYC, found a ready market of poor people on desperate times looking to get rich quick by any means possible
Because of cocaine surpluses in the early 80’s, the price of pure cocaine shot down, and dealers simultaneously discovered methods of cooking coke with baking soda into the potent and cheap form of crack cocaine. Dealing required very little entry-level capital expenditures for dealers and returns were so high it was conceivable to make such high profits as a dollar on 15 cents.
Another possible interpretation is that he he has a dime and nickel, a $5 bag of weed and a $10 bag of weed . He is trying to get money out of those two bags of weed, the figurative 15 cents.
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