0 someone who often fails or makes mistakes because they have very little ability or skill:
1 often failing or making mistakes because of a lack of ability or skill:
Christopher Plummer's performance as an alcoholic stumblebum in the movie was hailed.
Not even the most stumblebum troupe of mimes could have put on a funnier show.
I lost patience with the film's stumblebum attempts to portray this hypocrite as a martyr and a hero.
Will Smith stars as Hancock, a stumblebum boozer who also happens to be able to lift oil tankers and fly through the air.
