not know someone from Adam

US /nɑt noʊ ˈsʌm.wʌn frəm ˈæd.əm/
UK /nɑt noʊ ˈsʌm.wʌn frəm ˈæd.əm/
"not know someone from Adam" picture
1.

no conocer a alguien de nada, no saber quién es alguien

to not know someone at all; to have no idea who someone is

:
When the stranger approached me, I realized I did not know him from Adam.
Cuando el extraño se me acercó, me di cuenta de que no lo conocía de nada.
She claimed to be my cousin, but I did not know her from Adam.
Ella afirmó ser mi prima, pero yo no la conocía de nada.