牛蠅 [－蝇]

Jyutping ngau4 jing4
Pinyin niú yíng

Definitions (CC-CANTO)
  1. horsefly; cleg
Definitions (粵典–words.hk)
  1. 名詞
    牛虻​（​量​詞​：​隻​）
    horsefly
Definitions (Wiktionary)
  1. noun
    warble fly
  2. noun, regional
    gadfly