make a mint of money

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make a mint of money

To earn a very large amount of money, especially by doing something very successfully. We'll make a mint of money if we can manage to secure a trading partner in China. I hear Sarah is making a mint of money with sales from her latest novel.
See also: make, mint, money, of
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

mint of money, make a

Strike it rich; earn a huge profit. The mint in question here is the place where money is manufactured under government auspices, and by extension it betokens a vast amount of cash. “Mint of money” has been so used since the sixteenth century, but the idea of “making” it dates only from the nineteenth century, when large sums began to be acquired less from inherited wealth than from business enterprise.
See also: make, mint, of
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer