Subculture

[Agnes]

A subculture is a group of people with different ideologies and usually fashion and music tastes then that of the larger culture they are a part of. Many subcultures also [detest] the mainstream and commercialization.
Several subcultures flourish because of [the almost] genetic need for people to belong, most notably youth. Because of this, many corporations have taken notice of them and begun to exploit and profit off said [subcultures] music or fashion tastes. This leads to a complete bastardization of the original intentions of the group and may [kill off] the group entirely.
In short, a subculture is a group detaching itself from mainstream society, catering to certain peoples ideologies and preferences.

[Merna]

A cultural group within a larger culture, often having beliefs or interests at variance with those of the larger culture.

[PussyCat]

A [branch] off from [mainstream] culture embracing its own [unique style]. Often times, as more and more people do it, pieces of various subcultures become mainstream.

[Dave Paprocki]

It is a word made up by [goths] to describe their [movement]. It is basically a word used to describe a popculture movement that isnt popular any more [but still] has a following.

[Ernesto]

the way of life, customs, and ideas of a particular group of people within a society that are different from the rest of that society: