Try his damnedest - Idioms by The Free Dictionary
try (one's) damnedest (redirected from try his damnedest)
try (one's) damnedest
To put forth the maximum amount of energy or effort toward some task or goal. Money is a little tight at the moment, but I'll try my damndest to be there for your wedding.
do/try your ˈdamnedest (informal) try very hard; make a very great effort: He was doing his damnedest to make me feel uncomfortable so that I would leave.
References in periodicals archive
Cover boy Jack Fardell is official on adidas and Karsten Kleppens is on the roster at Skate Mental where he'll try his damnedest
to keep up with Nugget's ungodly ripping and Brad's mood swings.
Kerry said: "If there's something that can be removed from a shop he'll try his damnedest
to get it.
At just 18 years of age he will tell anyone prepared to listen that he is going to try his damnedest
to make it with Spurs.