Mainstream

Mainstream is, generally, the common current thought of the majority. However, the mainstream is far from cohesive; rather the concept is often considered a cultural construct. This includes:

* something that is available to the general public;
* something that has ties to corporate or commercial entities.

As such, the mainstream includes all popular culture, typically disseminated by mass media. The opposite of the mainstream are subcultures, countercultures, cult followings, and (in fiction) genre (believing they are different but they are NOT, they are the same but on another level i.e. still herd mentality, disillusioned within their 'ranks' etc.). Additionally, mainstream is sometimes a codeword used for an actual ethnocentric or hegemonic subculture (:jaded and/or jealous) point of view, especially when delivered in a culture war speech. It is often used as a pejorative term by subcultures who view ostensibly mainstream culture as not only exclusive but artistically and aesthetically inferior.

Wikipedia (slightly adjusted)