What is "fisch-ton-kan"

Fisch-Ton-Kan is an opéra bouffe in one act by Emmanuel Chabrier of which only some numbers survive. The French libretto was by Paul Verlaine, and probably Lucien Viotti, after the 'parade chinoise' Fich-Tong-Khan ou L'orphelin de le Tartarie of 1835 by Thomas Sauvage (1794-1877) and Gabriel de Lurieu (1792-1869).

The title is tongue-in-cheek, as Fisch-Ton-Kan is a phonetic rendition of French fiche ton camp, which may be translated as "clear off!".