Coins that you see or find on the ground that have been exposed to the elements so long they are black (cajun cooking does a lot of "blacked" this or that).
"Grandpaw was looking for money and he found some cajun coins, a quarter and three pennies."

"I barely saw the cajun nickle on the ground cause it was so dark."

"They may be black, but cajun coins spend as good as shiny ones."
by MR WOLF September 1, 2007
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