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.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi