Those who are normally hooked to whatever society says is popular, or cool. If you think about it really, there is a mainstream of non-mainstream kids. What the non-mainstream kids say you have to be in order to be non-mainstream.
I listen Green Day. I listen to epo-555. Mainstream can be good if ignorant fucks would stop conforming and hating everything that's on mtv. Who gives a fuck?
by Shippoking July 15, 2006
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The word used to describe a person who only likes things that are cool, and popular.
Mainstream people think Metal is dumb and stupid.
by God Does Not Exsist November 6, 2009
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Somebody that only likes music that is mainstream and will probably just get worn-out soon. A person that usually just follows trends. Mainstreamers don't always have a lot creativity to listen to underground material.
Mainstreamers: Wow this extremely popular and over-advertised new music album rocks!
by Maryanne Goff April 6, 2007
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Mainstream is the larger public, the masses, the big crowd. Things that are or become 'mainstream' are the things that currently sell the most and gain the most popularity.
Hip Hop has become mainstream and is being worn-out by the masses
by Diamond Princess July 1, 2004
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Whatever shit is forced upon teenagers(sheep) by MTV and other corporate cunts. The shit that true metalheads fight against.
Rap is mainstream, just another fucking trend. in 20 years, no one will remember it
by Zaal' Goron April 8, 2005
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Main•stream (mAn’strEm’), n., adj.

1) A genre in music and other forms of media that is often defined by widely-accepted and currently-popular standards, trends, and hypes that have been established by the media, typically resulting in the promotion of superficial traits.
My popular friends accept me because I'm hot and I like all the mainstream artists on MTV.
by Essix April 16, 2005
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This word lives a double life. On the one hand, it can describe something that is legitimately popular because it is good. However, through the hipster douche movement, the phrase "this ___ is mainstream" is used almost as often as "I love PBR" and "I need some more baby powder and Crisco to fit in my jeans."

According to many hipsters (or at least the obnoxiously arrogant ones), any musical artist that is signed to a label, sells music online or attracts more than a dozen people to his/her show is "mainstream," a "sellout," or any other word they found in their thesaurus they bought with their parents money.
One definition: "The band broke into the rock mainstream with its smash hit (insert song here)."

The newer definition: "Screw (insert band name here), that band is so mainstream. Come on, guys. Let's all dress in an identical manner and listen to music Pitchfork tells us is cool."
by DestroyAllHumans May 9, 2010
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