Prison slang is an argot used primarily by criminals and detainees in correctional institutions. It is a form of anti-language. Many of the terms deal with criminal behavior, incarcerated life, legal
Shiv
…as the prison authorities, it is also desirable to conceal possession of a shiv from members of rival prison populations. The word shank is American prison slang for an improvised stabbing weapon. Shanks can be made in various ways: a razor blade stuck into the melted end of a toothbrush; a metal bucket handle…
Clink Street, London. Site of Clink Prison, one of England's oldest prisons and origin of the slang "In Clink". Now home to a museum of the prison, the remains of Winchester Palace and a Starbucks.