A demon fox from Japanese folklore that some people believe reside in them. They are normally so heavy into anime that they deserve to be shot in the face, repeatedly.
Me: How you feeling?
Emo kid: My gf broke up with me, i feel like going kyuubi up at her
Me:God damn you are such a bitch nigg
A person pretending to be something they aren't, or an impostor. This is inferred because of the old alien movies where alien pods appear on earth and the "pod people" dispose of the humans and slowly reproduce the bodies, pretending to be humans.
The pod person was pretending to be my father, but I knew that he was an alien when he acted differently than my father ever would have.