feral
/ˈfɛɹəl/noun
Definitions
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.
(furry subculture) A character in furry art or literature which has the physical characteristics (body) of a regular animal (typically quadripedal), that may or may not be able to communicate with humans or anthros (contrasts anthro)
Example: The story is about a group of ferals which have to explore the ruins of society after the humans die out.
adjective
Definitions
Wild, untamed, especially of domesticated animals having returned to the wild.
(of a person) Contemptible, unruly, misbehaved.