From a UPI article: Prisoners resurrect 500 year old slang

The British Ministry of Justice is warning the country’s prisons that prisoners have taken to using a 16th-century slang to hide talk about drug deals.

The 500-year-old dialect, which is known as thieves’ cant or rogues’ cant, was believed to have been developed by medieval gypsies and adopted by a handful of scoundrels across England. Officials at Buckley Hall Prison in Rochdale said the dialect has resurfaced as a code for drug trafficking, the Daily Mail reported Monday.

Pretty cool to see the classic Thieves’ Cant that I first learned about while playing D&D has been brought back by the modern inheritors of the same social status as the originators.