Overindulgence can be described as having too much of something you really enjoy; a binge not necessarily booze, drugs or shagging but anything that gives you intense pleasure. On the other hand it can also mean something that those dreadful American females, like Kim Kardashian, seem to think is their right namely the excessive gratification of their wishes.
Overindulgence in anything can be detrimental to your health.
To pseuds like Kim Kardashian overindulgence is a way of life.
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.