A Montenigger has two meanings:
1. A loyal, patriotic SERB living in Montenegro, who is smart as hell and doesn't want to separate.
2. A cracked up m.f.er like Milo Djukanovic who wants to separate, and who is too stupid to realize that he is a SERB and that SERBIA AND MONTENEGRO ARE ONE NATION!!!
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.