cock·chaf·er
noun/ˈkɒktʃeɪfə(r)/
/ˈkɑːktʃeɪfər/
(also May bug)
- a large brown insect that flies and makes a loud noise in early evening in summer
鳃角金龟；五月甲虫；大栗鳃角金龟 Word Originearly 18th cent.: from cock (expressing size or vigour) + chafer.