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."

Dictionary Entries Near know what one is talking about

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 30 Nov. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!