Vermin
VERM'IN, noun sing, and plu; used chiefly in the plural. [Latin vermes, worms.]
1. All sorts of small animals which are destructive to grain or other produce; all noxious little animals or insects, as squirrels, rats, mice, worms, grubs, flies, etc.
These vermin do great injuries in the field.
2. Used of noxious human beings in contempt; as base vermin