damndest

That's right; you do your damndest—'angels can do no more,' as the feller said.

I'm all spread out on the floor with the damndest headache you ever saw.

I may be the damndest fool alive, but at least I'm an honorable fool.

It's going to be ten miles, across country, across the damndest country you ever saw, Sledge Hume!

For a fact, I smelt azaleas plain and sweet once; and woke up in the damndest alkali desert you ever see.

"You've got me beat between you, the cards are stacked against me, I've done my damndest—" and indeed that was true.