Opéra bouffon is the French term for the Italian genre of opera called opera buffa performed in 18th-century France, either in the original language or in French translation. The term was also used by Offenbach for three of his works: Orphée aux enfers, Le roman comique and Le voyage de MM Dunanan père et fils.
The term is sometimes confused with the French opéra comique.
References
Opéra bouffon Wikipedia(Text) CC BY-SA