killer bee

noun

1. a honeybee, Apis mellifera adansonii, native to Africa, that is extremely aggressive and attacks in swarms when disturbed: brought to Brazil and accidentally released there in 1956.
2. an American hybrid of the African and European honeybees produced by the mingling of domesticated European colonies with an expanding and migrating African colony that escaped from an apiary in Brazil.

noun

1. an African honeybee, or one of its hybrids originating in Brazil, that is extremely aggressive when disturbed