downtalking

Verb

downtalk (third-person singular simple present downtalks, present participle downtalking, simple past and past participle downtalked)

1. (idiomatic, informal, intransitive, transitive) To speak in a condescending or belittling way or manner, making someone or something seem less important or less intelligent.
2. (idiomatic, informal, transitive) To criticize or minimize something by speaking in this way or manner.