cockchafer /ˈkɒkˌt͡ʃeɪfɚ/ noun2 •Any of the large European beetles from the genus Melolontha that are destructive to vegetation.His impassioned words buzzed about my ears like cockchafers round the top of the lime-trees. — 1886 •Any of various other similar beetles, such as of the genera Acrossidius, Cyphochilus, Rhopaea, etc. formscockchafers