know something like the back of one's hand
idiom
: to know something completely
I know this town like the back of my hand.
Cite this Entry
“Know something like the back of one's hand.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/know%20something%20like%20the%20back%20of%20one%27s%20hand. Accessed 3 Mar. 2025.
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Merriam-Webster unabridged
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