Source : WordNet®

killer bee
     n 1: an investment banker who devises strategies to make a target
          company less attractive for takeover
     2: a strain of bees that originated in Brazil in the 1950s as a
        cross between an aggressive African bee and a honeybee;
        retains most of the traits of the African bee; now spread
        as far north as Texas [syn: {Africanized bee}, {Africanized
        honey bee}, {Apis mellifera scutellata}, {Apis mellifera
        adansonii}]