I ask you! idiom informal
这叫什么事啊！（表示吃惊或愤怒）
something that you say in order to show your surprise or anger at something someone has done
They stayed for a month and left without even saying thank you! Well, I ask you! 他们住了一个月却连句谢谢都没说就走了。这叫什么事啊！