interrobang[in ter′ə baŋ′]
interrobang definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a punctuation mark (‽) used to express incredulity, disbelief, etc.
Origin: interro(gation mark) plush bang, proofreaders' term for exclamation mark
interrobang definition by American Heritage Dictionary
A punctuation mark in the form of a question mark superimposed on an exclamation point, used to end a simultaneous question and exclamation.
Origin: interro(gation point) + bang1, exclamation point (printers' slang).