Hello, if you are so confused with something, you could say 什么鬼.

什麼鬼 is a very Taiwanese expression. I have never actually heard any of my friends from China say this. https://www.youtube.com/watch?v=wMIPHbGV2f0 the host in this video says "什麼鬼" at 4:45 in this video. It's a bit like saying "Whaaa? What (the hell) is that?", but it isn't as rude as the English equivalent. Laurence

和what the heck是一个意思的

such as 1 这是什么（normal speaking） 2这是什么鬼？（funny speaking） thay are same meaning

什么鬼=什么。什么鬼 is the way of funny speaking.