Vermin n. sing. & pl. : An animal, in general.

Vermin n. sing. & pl. : A noxious or mischievous animal; especially, noxious little animals or insects, collectively, as squirrels, rats, mice, flies, lice, bugs, etc.

Vermin n. sing. & pl. : Hence, in contempt, noxious human beings.

Example:
How do you make the Vermin come in quest sheogorath in oblivion?

Taxonomy
vermin, Varmint, free encyclopedia, Varmit, farms, animal species, disease, balance, Dictionary, 03-05, pests, search, Unsourced, bane, Australian farmers, wild rabbit, dialect regions, nuisances.

Defination from the web:
Vermin is not a prevalent term in Standard Written English, it is a common descriptor for certain kinds of ... may be considered vermin, or, pejoratively, "flying rats." Some varieties of snake are also referred to as vermin from time to time. ...