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.
A gold- or green-eyed horsefly of the genus Chrysops in the family Tabanidae; pests to cattle, horses and humans, feeding on their blood.
Sometimes diminutive: a cheeky person or creature; a troublemaker.
A dishonest person; a rogue, a scoundrel, a trickster.
A member of a criminal gang.