1(in Christian belief) condemned by God to suffer eternal punishment in hell:damned sinners (as plural noun the damned)the spirits of the damned
2 [attributive] informal used for emphasis, especially to express anger or frustration:it’s none of your damned business [as submodifier]:she’s too damned arrogant
(damnedest) North American used to emphasize the surprising nature of something:the damnedest thing I ever saw
do (or try) one's damnedest
informal
do or try one’s utmost:I tried my damnedest to lift the ball