1 definition by Sierra Sam

Top Definition
Someone who that revels in the thought of destruction of the planet or humanity due to global warming.

Antonym: denier.

Doomers hold an unshakable faith that the planet is inevitably doomed because of anthropogenic global warming and that nothing can reverse earth's ultimate destruction. In particular, doomers seem to take joy in discussing and contemplating a global doomsday.
The doomer took great joy in debunking a report that suggested that global warming doomsday predictions were exaggerated.
by Sierra Sam February 09, 2012

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