mack
n.— «Mr. Levine and his client were prisoners in California’s Lompoc Federal Correctional Complex. Like other federal inmates around the country, they found a can of mackerel—the “mack” in prison lingo—was the standard currency.» —“Mackerel Economics in Prison Leads to Appreciation for Oily Fillets” by Justin Scheck Wall Street Journal Oct. 2, 2008. (source: Double-Tongued Dictionary)
Further reading
The game of baseball has alway inspired colorful commentary. Sometimes that means using familiar words in unfamiliar ways. The word stuff, for example, can refer to a pitcher’s repertoire, to the spin on a ball, or what happens to the ball...
What do you call a long sandwich filled with lots of ingredients? Whether you call it a sub, a hoagie, a grinder, or something else entirely depends on where you’re from. And: Martha’s visit to an Alaskan reindeer ranch reveals why you...