不屑置辩bù xiè zhì biàn

(of a question) be beneath contempt; not worth answering
❍ 孔乙己看着问他的人，显出～的神气。他们便接着说道：“你怎的连半个秀才也捞不到呢？” (鲁迅《呐喊·孔乙己》22) When Kong looked as if such a question were beneath contempt,they would continue:“How is it you never passed even the lowest official examination?”

不屑置辩bùxiè-zhìbiàn

〔偏正〕 不值得或不愿去辩解。鲁迅《孔乙己》：“孔乙己看着问他的人，显出～的神气。”
△ 用于不值一提的场合。
【近义】不屑一顾