Wiktionary
goddamndest
a. (alternative form of goddamnedest English)
Usage examples of "goddamndest".
But I am and have been doing my goddamndest to turn out printable copy for you.
You come out with some of the goddamndest flat-footed opinions with respect to matters which you haven't studied and have had no experience, basing your opinions on casual gossip, newspaper stories, unrelated individual data out of matrix, armchair extrapolation, and plain misinformation-unsuspected because you haven't attempted to verify it.
I want to give my beloved the goddamndest 'white mutiny' ever, one that he will remember with shudders and never again give a skipper any lip.
If he does shoot at you, try your goddamndest to get to the next set of rapids, or around the next turn.