know someone when

idiom

Definition of know someone when

: to know someone before he or she was famous or successful I can say I knew you when.

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know (someone) of old

know someone when

know something backward and forward

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Cite this Entry

“Know someone when.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/know%20someone%20when. Accessed 9 Aug. 2022.

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