interjection, noun Informal.
Examples from the Web for darnation
Say, you can't hide yourself in a corner of this darnation territory I won't find you in.
It goes with me every time, and I pray the good God of this darnation wilderness it always will.
Jest get to it an' set all the darnation territory you ken find between you an' Bell River before to-morrow.The Triumph of John Kars|Ridgwell Cullum
I'll be darned to darnation if I du, and that's the eend on't!
Bill there could drive stage as well as I can, only if I didn't hold on to him he'd have us all to the darnation in five minutes.Poganuc People|Harriet Beecher Stowe