‘The lexicography of slang: slang’s dictionaries’ considers the slang-related texts that make up the slang lexicographical ‘canon’. Traditional English-language slang lexicography can be broken down into three successive periods. The ‘canting’ or criminal slang dictionaries of the 16th to 18th centuries, the ‘vulgar tongue’ works of the late 18th to mid-19th, and the ‘modern’ productions that have appeared since. A fourth category can now be added: on-line dictionaries. Works discussed include Thomas Harman’s Caveat for Common Cursetors (c.1566); The Classical Dictionary of the Vulgar Tongue, Grose (1785); John Camden Hotten’s Modern Slang, Cant and Vulgar Words (1859); and Dictionary of Slang and Unconventional English, Partridge (1937).