know what one is talking about

idiom

: to be saying what is correct from actual knowledge or experience with something
Take her advice. She knows what she's talking about.
"He said the movie is boring." "Don't listen to him. He doesn't know what he's talking about."

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Cite this Entry

“Know what one is talking about.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/know%20what%20one%20is%20talking%20about. Accessed 24 Jul. 2024.

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