pi·ra·nha /pəˈrɑnə; ˈrɑnjə, ˈræn-/
  南美產的小魚
  piranha
       n 1: someone who attacks in search of booty [syn: marauder, predator,
             vulture]
       2: small voraciously carnivorous freshwater fishes of South
          America that attack and destroy living animals [syn: pirana,
           caribe]