know one's stuff

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Idioms and Phrases

Also, know one's onions . Be experienced or knowledgeable in one's field or in the matter at hand. For example, Patrice knows her stuff when it comes to Mexican history , or We need a handyman who knows his onions . The allusion in the variant is unclear. [First half of 1900s]

Word of the Day

April 23, 2024inveterate

[in-vet-er-it ]

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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