do (one's) damnedest

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do (one's) damnedest

To try one's hardest (to do something). Traffic out here is terrible, but we'll do our damnedest to get there on time. I'm doing my damnedest to get an A in this class, even though I'm terrible at math.
See also: damnedest

do your damnedest

INFORMAL, RUDE
If you do your damnedest to achieve something, you try as hard as you can to do it. I did my damnedest to persuade her. She was doing her damnedest to look as if she didn't care. Note: People sometimes use try instead of do. Ted tried his damnedest to explain things.
See also: damnedest

do (or try) your damnedest

do or try your utmost to do something.
The superlative form of the adjective damned is used here as a noun and can mean either ‘your worst’ or (more usually now) ‘your best’, depending on the context.
See also: damnedest