stumblebum

noun

1. A blundering or awkward person.
2. An inept prizefighter.
3. (slang)A homeless person.

   “A bum came shambling past us.... "Fucking stumblebums," Corsetti said.... "Is 'stumblebum' the acceptable term for our indigent brothers and sisters?" "Sometimes I like 'vagrants,'" Corsetti said. "Depends on how much style they got."”