a trebhum from the eternal cyliner, made with stealth legs, tongued trunk, regenerative body, analytical eyes, and third eye. it is said that poopenfartens are extremely lazy, so lazy that they don't even speak often, and that they could be some sort of epidemic, slowly turning trebhums into permanent poopenfartens. On top of them all is the poopenfarten overlord.
P1: yo have you heard of the poopenfarten?
P2: whats that?
P1: its a trebhum from the eternal cylinder
P2: oh okay.
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.