you don't say! idiom informal
（表示惊讶）不会这样吧！不至于吧！（幽默且不太客气地表示并不惊讶）我就知道！
used either to express surprise or lack of surprise in a humorous and slightly unkind way
"He's lost his job." "You don't say!" “他丢掉了工作。”“不会吧！”
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