There are a variety of uses for this expression, but all of them involve something or someone that is bothering you. Sometimes a parent will say this to a child who bothers them when something important needs to be done. Sometimes a person has an unfinished task which finally is completed. I finally got that out of my hair.
離開我；別來煩我！
本句有多種用途，卻都跟「造成麻煩」的人、事、物有關。例如：父母有事要忙，可能跟小孩說：「別纏著我」(get out of my hair)；而好不容易做完一件苦差事之後，可能說：「啊！終於將它擺平了」 (I finally got that out of my hair)。