两眼一抹黑

两眼一抹黑

Literally means:

one's eyes were black

Actually means:

It figuratively refers to the state of knowing nothing about people or things of a place. It is usually used to describe one's unfamiliarity with a new situation. Also used to describe one's insensible way of handling things

比喻什么人也不认识，什么情况也不了解。多形容人到了一个新的环境，对周围不熟悉，也指做事情糊涂。