level best

level best

English

Noun

level best (plural level bests)

1. (idiomatic) The very best that one can do
   • 1922, James Joyce, Ulysses Chapter 13

     --Say papa, baby. Say pa pa pa pa pa pa pa.

     And baby did his level best to say it for he was very intelligent for eleven months everyone said and big for his age and the picture of health

See also

• personal best