doomer

doom +‎ -er

doomer (plural doomers)

1. One who believes that petroleum depletion will inevitably lead to a severe recession or depression, followed by a Malthusian catastrophe.
   • 2009, David Holmgren, Future Scenarios

     Those who suggest the likely return of the four horsemen of the apocalypse (famine, pestilence, war, and death) are more vocal than ever before despite being labeled Malthusian or just "doomer."

2. (rare) One who, or that which, dooms.
   • 1599?, William Shakespeare, As You Like It

     Are not the heavens doomers of men's deedes?

   • 1869, Edward Bulwer Lytton, Prose Works

     That fatal look of a common intelligence, of a common assent, was exchanged among the doomers of the prisoner's life and death, as the judge concluded.

• moored, roomed