talk trash

talk trash (third-person singular simple present talks trash, present participle talking trash, simple past and past participle talked trash)

1. (slang) To talk disparagingly about something.

• This is an idiomatic instance of a general construction consisting of talk with the topic area as object of the verb. One can talk baseball, talk philosophy, or talk shop.

• talk shit (slang, vulgar)
• trash-talk

• trash-talk