try (one's) level best

try (one's) level best

To try as hard as one can; to try one's best. I'm just not good at math, so believe me, a B- in Algebra means that I've tried my level best. No, you're not the star player on the team, but you always try your level best, which encourages the rest of us to do the same.See also: level, try

do/try your level ˈbest (to do something)

try as hard as you can: I’ll do my level best to be there by ten o’clock, but I can’t promise anything.See also: level, try