know what (one) is talking about

To be adequately knowledgeable about or experienced in something one is discussing. Mister, I don't think you know what you're talking about. There's no way these old pipes can withstand that kind of pressure!See also: know, talk, what

know what you’re ˈtalking about

(informal) have good knowledge of something; be an expert on something: I really enjoyed that lecture. She certainly knows what she’s talking about. ♢ That history teacher doesn’t know what he’s talking about. He makes a lot of mistakes.See also: know, talk, what

单词	know what (one) is talking about
释义	know what (one) is talking about know what (one) is talking about To be adequately knowledgeable about or experienced in something one is discussing. Mister, I don't think you know what you're talking about. There's no way these old pipes can withstand that kind of pressure!See also: know, talk, what know what you’re ˈtalking about (informal) have good knowledge of something; be an expert on something: I really enjoyed that lecture. She certainly knows what she’s talking about. ♢ That history teacher doesn’t know what he’s talking about. He makes a lot of mistakes.See also: know, talk, what
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