For youse edjication. I was passing by the tv when a quiz question caught me. Some might think I am ignorant but I don't like being ignorant about some things, so how come I had never heard of an interrorbang before? R had not heard of the word either and suggested it was some text speak.
It can also be spelt interabang. If I had a typewriter, I could show you how it should look. I would type a question mark and then backspace and put an exclamation over the top of the question mark. However in these sophisticate electronic days, I can't do that, so it is typed as ?! I know there are all sorts of hidden things on a keyboard, so perhaps it can be done properly.
Interestingly it is used in more than just the English language.
So you need some context. The best I can come up with is a line from a movie I have never seen, but so many know the line anyway. Paul Hogan in Crocodile Dundee: "You call that a knife?! This is a knife", as he is threatened with a knife and then pulls out his own monster knife.
Useful? I don't know. I can't see it catching on really. Have you heard of interrorbang?