The interrobang (often represented by ?!, !?, ?!? or !?!) is an unconventional punctuation mark used in various written languages and intended to combine the functions of the question mark, or interrogative point; and the exclamation mark, or exclamation point, known in the jargon of printers and programmers as a "bang". The interrobang was first proposed in 1962 by Martin K. Speckter.
The interrobang's ascent to glory could take some time. Most keyboards still have no dedicated key for an @ sign, which is something most of us have used many times a day for two decades. Summoning a hash sign is still a pain, too, while the useless \, whose existence I resent almost as much as that of the tilde, sits there lording it up with its own key.