(well) what do you know! idiom informal
（表惊讶时用，常借此幽默地表达相反的意义）真想不到！你说怪不怪！
something you say when you are surprised by a piece of information. This phrase is often used humorously to mean the opposite
So they're getting married, are they? Well, what do you know! 这么说他们要结婚了，是吗？真想不到！
Well, what do you know! The Raiders lost again! 唉，你说怪不怪！突袭者队又输了！