bell ringer
     n 1: a person who rings church bells (as for summoning the
          congregation) [syn: {toller}, {ringer}]
     2: someone who plays musical handbells
     3: something that exactly succeeds in achieving its goal; "the
        new advertising campaign was a bell ringer"; "scored a
        bull's eye"; "hit the mark"; "the president's speech was a
        home run" [syn: {bull's eye}, {mark}, {home run}]
Source: WordNet® 2.0