| Noun | 1. | blow fly - large usually hairy metallic blue or green fly; lays eggs in carrion or dung or woundsfly - two-winged insects characterized by active flight Calliphora, genus Calliphora - type genus of the Calliphoridae: blowflies Calliphora vicina, bluebottle - blowfly with iridescent blue body; makes a loud buzzing noise in flight greenbottle, greenbottle fly - blowfly with brilliant coppery green body |