Said of a person who is becoming less and less intellectually coherent ( not because of mental health but due to the oral garbage they spew) and therefore losing their intellectual relevance and appeal to the masses.
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.