disappearing act
noun
(亦作disappearing trick)
- informal an instance of someone being impossible to find, especially when they are required to face something difficult or unpleasant〈非正式〉（尤指需面对困难或不愉快的事情时）（某人的）消失, 不见踪影：
I don't want you doing a disappearing act on me.
我可不希望你跟我玩失踪的把戏。