An eboy who likes to watch anime and hentai. A vampus might also enjoy harassing small children in video games.
A vampus is most definitely a virgin who gets shivers when interacting with people from the opposite gender.
Person 1: He just called me bad and worthless
Person 2 : He's most definitely a vampus
Person 1: What do you get up to on your leisure time?
Person 2: I usually watch anime and hentai.
Person 1: What an absolute vampus
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.