"hey hinerman how you like that sassage in the anal passage" "oh i love it man especially steve guantts when we make out at partys and fuck each other in the brown eye"
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.