The unwelcome opposite of good news. Often no news is good news, but on the other hand no news can be bad news as well. Andrew Loog Oldham once said "To the Rolling Stones, bad news is good news." It's exactly this kind of obfuscation on the part of the English that led to the War of 1812.

This phrase can also be used as an adjective to describe someone whose presence can only mean trouble. "That cat's bad news," you may say.