screw loose 脫線，神經不對頭
Bill must have a screw loose somewhere; he’s acting really strangely. Bill一定是哪根筋不對，他的行動真奇怪。
He must have a screw loose having a picnic on such a rainy day. 他腦筋一定有問題，在這種下雨天還跑去野餐。
She eats nothing but nuts, she must have a screw loose! 她這個人除了乾果，什麽都不吃，准是有毛病！
John must have a screw loose to quit such a good job. 約翰辭掉這麼好的工作，一定是神經不正常。
