Oh those Doomers! You know who I'm talking about! Those negative people who are constantly fear-mongering about the end of the world. Going on and on about how bad things are going to get, and how awful life is going to be in the future. Why, at their worst, Doomers are painting a picture of a world in flames!
These Doomers are so obsessed with their fear-mongering that it has almost become, well, cultish.