give (one's) best(redirected from give their best)
give (one's) best
To try as hard as one can to do or accomplish something. Laura is devastated that she gave her best and still didn't win the student council election. I know Tracy's an excellent runner, but you can compete with her—you just have to give your best.
See also: give
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.