bravo

bravo (http://definr.com/bravo)

     n 1: a murderer (especially one who kills a prominent political
          figure) who kills by a treacherous surprise attack and
          often is hired to do the deed; "his assassins were
          hunted down like animals"; "assassinators of kings and
          emperors" [syn: assassin, assassinator]
     2: a cry of approval as from an audience at the end of great
        performance
     v : applaud with shouts of "bravo" or "brava"