Definition
An expression used to convey surprise or, humorously and somewhat sarcastically, a lack of surprise.
（表示惊讶）不会吧！不至于吧！（幽默且带点不客气地表示并不惊讶）我早就知道了！
"He's late again." "You don't say!"
"他又迟到了。" "不会吧！"
"I won the lottery jackpot!" "You don't say!?"
"我赢了彩票头奖！" "不会吧！？"
"I stayed up studying until 6 AM yesterday." "You don't say!?"
"我昨天读书读到早上6点。" "不会吧！？"