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
A listener adds to our collection of slang used by RV enthusiasts. When she’s not in her sticks and bricks–that is, her brick-and-mortar home in Michigan–she’s driving around in her motor home chasing 70, which in the RV community means “trying to...
When your server brings food to the table and inquires as to who ordered which dish, that’s informally known in the restaurant biz as auctioning. If your meal is delayed because the person who took your order forgot about it, that’s called a pocket...