know (what's) best

idiom

Definition of know (what's) best

: to know (better than someone else) what is the best thing to do or say in a particular situation I would take the highway myself, but you live here so you know best.

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“Know (what's) best.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/know%20%28what%27s%29%20best. Accessed 29 Sep. 2020.

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