Opéra bouffon
Opéra bouffon is the French term for the Italian genre of opera buffa (comic opera) performed in 18th-century France, either in the original language or in French translation. It was also applied to original French opéras comiques having Italianate or near-farcical plots. The term was also later used by Jacques Offenbach for five of his operettas (Orphée aux enfers, Le pont des soupirs, Geneviève de Brabant,  and Le voyage de MM. Dunanan père et fils), and is sometimes confused with the French opéra comique and opéra bouffe. Notes

References
 Bartlet, M. Elizabeth C.: "Opéra bouffon", in: The New Grove Dictionary of Opera, ed. Stanley Sadie. Volume three, London 1992, p. 685. . French words and phrases
Opera genres
Opera terminology