It's Angela Merkel's fault.
Since the German chancellor used the term "shit-storm" to describe the Eurozone fall-out, the word has become accepted currency in her homeland.
And now it has been officially included in the standard German dictionary.
Duden, the equivalent of the Oxford English Dictionary, has featured "shit-storm" in its latest update, saying that the (perhaps) controversial move merely reflects the common way of speech of German-speaking people.
The Duden definition runs: "Noun, masculine - a storm of protest in a communications medium of the internet, associated in part with insulting remarks."