not know from Adam

not know (one) from Adam

To not know who someone is just by looking at them; to have never met someone before. After working at the company for nearly ten years, and Jake's boss still didn't know him from Adam. I don't blame them for not giving me permission right away; they don't know me from Adam.
See also: Adam, know, not

not know someone from Adam

Fig. not to know someone by sight at all. I wouldn't recognize John if I saw him up close. I don't know him from Adam. What does she look like? I don't know her from Adam.
See also: Adam, know, not
References in periodicals archive ?
Mrs Wilby, of Tynemouth, said: "It was weird to get a call from someone who you do not know from Adam, to say that he was holding such personal details.
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