damned ‧ est /ˈdæmdəst, ˈdæmdɪst/ BrE AmE adjective spoken not polite
1 . do/try your damnedest to try very hard to do something:
I’ll do my damnedest to fix it, but I can’t promise anything.
2 . [only before noun] used to emphasize that something is unusual, surprising etc:
It was the damnedest thing you ever saw!