A gold- or green-eyed horsefly of the genus Chrysops in the family Tabanidae; pests to cattle, horses and humans, feeding on their blood.
A Eurasian species of louse fly in the family Hippoboscidae, Lipoptena cervi; parasites of elk, deer and other bovine animals, sucking blood and laying eggs in the fur of the host animals.
Any destructive insect that attacks crops or livestock; an agricultural pest.
An animal regarded as a nuisance, destructive, or a parasite, vermin.
An annoying person, a nuisance.
An invasive weed.