not know from Adam

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.
Full browser ?