Polari

Polari (from Italian parlare 'to talk') is a form of slang or cant historically used primarily in the United Kingdom by some actors, circus and fairground performers, professional wrestlers, merchant navy sailors, criminals and prostitutes, and particularly among the gay subculture.

There is some debate about its origins, but it can be traced to at least the 19th century and possibly as early as the 16th century. Polari has a long-standing connection with Punch and Judy street puppeteers, who traditionally used it to converse.