do (one's) damndest(redirected from do her damndest)
do (one's) damndest
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 do my damndest to be there for your wedding. I'm doing my damndest to get a passing grade in this class.
See also: damndest
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.