emotional result we call happiness, most of us tend to engage in behaviour that is the exact opposite and then feel awful and inadequate with the inevitable result.
A subcategory within a particular genre: The academic mystery is a subgenre of the mystery novel. subcategory within a particular genre: The academic mystery is a subgenre of the mystery novel.
A culture that has formed in mainstreem culture and then take it under ground. The easiest subculture to use as an example is the goth scene. It started from the punk movment and then went underground when punk and goth music became un-popular (ie no longer in the pop charts) where it flourished.