Mikeanium is a dude who is caring, loving, protective, kind, and terrible at humor and constantly uses the word nerd and heh and he likes to copy people.
Hans: you heard about Mikeanium ?
Mikeanium: Yes Nerd
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.