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know what one is talking about

Slang definitions & phrases for know what one is talking about

know what one is talking about

verb phrase

To be very knowledgeable •Often used in the negative, denoting speaking in ignorance: popped off without knowing what he was talking about (1920+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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