Thieves' cant is a cant, cryptolect, or argot which was formerly used by thieves, beggars, and hustlers of various kinds in Great Britain and to a lesser extent in other English-speaking countries. It is now mostly obsolete and used in literature and fantasy role-playing, although individual terms continue to be used in the criminal subcultures of Britain and the United States.

The Peak Cavern, also known as the Devil's Arse, is one of the four show caves in Castleton, Derbyshire, England. Peakshole Water flows through and out of the cave, which has the largest cave entrance in Britain.