1. An awkward stupid person
   "He behaved like a stumblebum at the dinner party";
   - lout, clod [informal], goon [informal], oaf, lubber, lummox [informal], lump [informal], gawk, clot [Brit], clodhopper [informal], clodpole [archaic, informal]
    
2. A second-rate prize fighter
   "The aging stumblebum hoped for one last shot at glory in the ring";
   - palooka [N. Amer, informal]

Derived forms: stumblebums

Type of: boxer, clumsy person, pugilist