The idiom "talk trash" is an American English idiom that means to speak in a boastful or insulting way, especially to an opponent in a contest or game. It is thought to have originated in the early 1900s in the context of sports, but it quickly spread to other areas of life. The expression eventually came to be used figuratively to describe someone who is insignificant or worthless. Thus, "talk trash" is literally to talk to someone as if they are trash, which is a way of insulting them and making them feel inferior.

英語での「 talk trash」の定義と意味

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