Definition of mauvais langue in US English:

mauvais langue

noun

Tobago, Caribbean, Trinidad
  • Malicious gossip or rumours; critical or slanderous talk.

adjective

Tobago, Caribbean, Trinidad
  • Given to or characterized by malicious gossip; backbiting; slanderous.

verb

Tobago, Caribbean, Trinidad
  • with object To disparage, criticize, or abuse (a person, especially someone who is not present).

Origin

1940s. From French Creole mauvais langue from French mauvais bad + langue; evidently a French Creole calque from West African languages parallel to the Anglophone Creole calque bad-talk<br>1950s. From mauvais langue. Compare bad-talk.

Pronunciation

mauvais langue

/ˌməʊveɪ ˈlɒŋɡ/