do (one's) darnedest

do (one's) darnedest

To put forth the utmost amount of energy or effort toward some task or goal. A more polite version of "do one's damnedest." Money is a little tight at the moment, but I'll do my darnedest to be there for your wedding.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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