bus ‧ boy /ˈbʌsbɔɪ/ BrE AmE noun [countable]
[ Date: 1900-2000 ; Origin: omnibus 'helper in a restaurant' (19-20 centuries) (from Latin ; ⇨ ↑ omnibus 1 ) + boy ]
American English a young man whose job is to take away dirty dishes from the tables in a restaurant