An extremely fake person that lives in their own world and is completely oblivious to the fact that they are fake. When around this person their fakeness seems to spread and infect others.
Nishant: Hey, you'refake.
Vinny: You're brown.
Marco: Wow! Vinny is a fakiefakerson!
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.