know from Adam

not know somebody from Adam

to have never met someone and not know anything about them Why should I lend him money? I don't know him from Adam.
See also: Adam, know
References in periodicals archive ?
Frankly, the thought of sharing a dormitory with a bunch of people you don't know from Adam is a bit off-putting.
There are plenty of people given parts in shows who I wouldn't know from Adam but who are perfectly entertaining and go on to great things.
So, instead of starting from scratch and weeding through a near-endless stream of realtors you don't know from Adam, get some personal recommendations.
I've heard him cracking jokes with the postman, meter reader and parcel delivery boy - all people he doesn't know from Adam - after shouting and swearing at his wife.
To me, he was just a white-haired gentleman I didn't know from Adam.
This always sets the conversation on a downward spiral, since I react very badly to being addressed as "mate" by people I don't know from Adam.
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.
The trouble is that test-purchase agencies send in kids who we don't know from Adam and of course you can never tell their age so you have to refuse to serve them.
As a working mum, I'm tempted but incredibly nervous about handing them over to a group of strangers I don't know from Adam.
As you might expect of your 'man on the street', I was strolling down the road minding my own business when a bloke I didn't know from Adam tapped me on the shoulder and asked: 'Are you silly, naive, or both?
I personally think it's a greater motivation to try and beat your friend than someone you don't really know from Adam.