Pejorative term used to describe mainstream news outlets like CNN, Fox, Washington Post... heck, basically all of them, that choose to spin and propagandize and make people outraged rather than actually report objective news. These outlets are all slowly withering because statistically the vast majority of viewers are Baby Boomers or older, and younger generations are increasingly turning to the internet, especially YouTube, for more substantive content free of corporate interference.
"Dad, I don't mind eating dinner with you tonight but turn off your Boomer News, that shit rots your brain."