Definition
Refers to a person who is difficult to deal with, often because they are stubborn and unpleasant.
难搞的人
The new manager is a tough nut; it's very difficult to persuade him to change his mind.
新经理是个难对付的人，很难说服他改变主意。
Although he’s a good employee, he can sometimes be a hard nut to work with.
虽然他是个好员工，但有时很难共事。
She never listens to advice from others; she's a tough nut to crack.
她从不听取别人的建议，是个难搞的人。