The interrobang combines the exclamation point and the question mark:
? + ! = ‽
Dictonary.com defines the interrobang as
in·ter·ro·bang
[in-ter-uh-bang]–noun
a printed punctuation mark (‽), available only in some typefaces,designed to combine the question mark (?) and the exclamationpoint (!), indicating a mixture of query and interjection, as after arhetorical question.
Origin:
Since its invention the interrobang has been reduced to that as a fad and been replaced simply by the punctuation marks that make it (?!).
Who knew?