I was reading a story on the BBC News website about parents trying to force schools to ban certain books.

The article features a quote from an author who wrote a series of books entirely in text-speak:

"It is so revealing to me the vituperativeness they address me with. They are angry,"

I could make a decent guess on the meaning of vituperativeness but I decided to google it to confirm my suspicions. Out of the first 20 hits on Google, all but one were dictionaries or similar word-related sites, most of them containing the same definition (harshly abusive censure). Google only found 3870 results, suggesting it isn't a word which normal people use in everyday conversation. I suspect the author, Lauren Myracle, said it to prove she knows longer words than those used in text-speak.