The interrobang, also known as the interabang, (pron.: //), ‽ (often represented by ?! or !?), is a nonstandard punctuation mark used in various written languages and intended to combine the functions of the question mark (also called the “interrogative point”) and the exclamation mark or exclamation point (known in printers’ and programmers' jargon as the “bang”). The glyph is a superimposition of these two marks.
A sentence ending with an interrobang asks a question in an excited manner, expresses excitement or disbelief in the form of a question, or asks a rhetorical question.
@MargotLurie That's a good start. Or how about the interrobang ‽ http://t.co/PuG3HL9T6o. Looping in @whitmanthesloth.