varmint - var·mint (vär′mĭnt)

Related to varmint: vermin
n. Informal
One that is considered undesirable, obnoxious, or troublesome.
vagrant - va·grant (vā′grənt)
Related to vagrant: docker
n.
1. a. One who wanders from place to place without a permanent home or a means of livelihood.
b. Archaic A wanderer; a rover.
2. One who lives on the streets or constitutes a public nuisance.
3. An animal occurring beyond its normal range; an accidental.
adj.
1. Wandering from place to place and lacking any means of support.
2. Living on the streets or constituting a public nuisance.
3. Inconstant or capricious; wayward: "She was resolved to win my vagrant fancy" (Frank Harris).
4. Moving in a random fashion; having no fixed direction or pattern: vagrant ice floes; a vagrant aroma.
5. Being beyond its normal range; accidental. Used of animals. www.thefreedictionary.com/vagrant www.thefreedictionary.com/varmint