If you accuse someone of malpractice, you are accusing them of breaking the law or the rules of their profession in order to gain some advantage for themselves.
例句
There were only one or two serious allegations of malpractice.只有一兩起有關營私舞弊的嚴重指控。...alleged financial malpractices.涉嫌財務舞弊
英漢詞典釋義
n.
<律>玩忽職守, 瀆職, 不法行為
She sued her doctor for malpractice.她控告她的醫生失職。
英英詞典釋義
Noun
1. professional wrongdoing that results in injury or damage;
"the widow sued his surgeon for malpractice"
2. a wrongful act that the actor had no right to do; improper professional conduct;