Definition of orange fly in US English:

orange fly

noun

  • 1Angling. A fly with an orange body and black wings, used as bait; an artificial fly imitating this. Now rare.

  • 2A fruit fly whose larvae infest oranges. rare.

Origin

Mid 17th century; earliest use found in Robert Venables (d. 1687), parliamentarian army officer. From orange + fly.

Pronunciation

orange fly

/ˈɒrɪn(d)ʒ ˌflʌɪ/