Feral
/ˈfɛɹəl/
noun
A domesticated animal that has returned to the wild; an animal, particularly a domesticated animal, living independently of humans.
A contemptible young person, a lout, a person who behaves wildly.
A person who has isolated themselves from the outside world; one living an alternative lifestyle.
adjective
Wild, untamed, especially of domesticated animals having returned to the wild.
(of a person) Contemptible, unruly, misbehaved.