I'm not sure if that link is publicly accessible, but the word is "unicorpse", a dead unicorn, a startup that had a billion dollar valuation and is now defunct.
The whole front page of today's Chron is about the coming tech bust.
The 2-man app company that was squatting in our office is gone. After two years and about $12e6 invested, they realized that it wasn't working, returned the remaining money to the investors, and got jobs.
I hope Dropbox survives. I love Dropbox.