not know someone from Adam
idiom
informal
: to have never met with someone : to not know someone at all
Why should she trust me? She doesn't know me from Adam.
Cite this Entry
“Not know someone from Adam.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/not%20know%20someone%20from%20Adam. Accessed 31 Oct. 2025.
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