This is my new term. It describes someone who acts and talks like a pessimist, when all along the real determination is optimism.
I am a back door optimist.
When something comes up (an opportunity, a problem), I immediately assume the worst will happen. And why do I do that? Because the worst WON'T happen, and then I'll be a step or two further toward happy than I would have been if I had optimistically expected the best but didn't get it.
The only hitch to this is when the worst does happen. Because I wasn't, actually, expecting that.
You might say I'm a "glass is 1/8 full" kind of gal.