Music that always plays on the radio and the TV, and is on the top 40 list on every music software like iTunes and Spotify. It is quick-made on a computer, usually featuring not very good but good looking musicians (if they can be called that) and it is un-original and boring. People without any taste in music listen to it because it's easy to find and everyone else listen to it, so then they don't need to worry about being considered "different". Mainstream music songs usually stay on the top-lists for a couple of months or maybe a year, and then they're gone. Also, people who listen to it usually would call a 2 year old song "very old", though bands like Led Zeppelin still rock anyone's brains out with their songs from the seventees.
Annoying teen girl: "Oh my god, have you heard that new Rihanna song? I love it!"

A month later, someone puts on the same mainstream music song

Same annoying chick: "Eww that song is old and outdated, turn it off"
by rocknroller2012 November 27, 2012
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Music that focuses on getting stuck in your head and becoming so ubiquitus that you are forced to like it or else you will have clinical depression from hearing it so much. This music is almost always made by humans who are often called musicians (but in all truth, are not musicians) who manipulate their image for monotary reasons. This music often focuses on sounding much more technological than musical. Much pop and hip-hop to enter the top 40 has been mainstream crap since the '00's.
person 1: Man, Lady Gaga, The BEP, and other mainstream crap has been all over the place, it makes me want to commit suicide

person 2: I use to think the same thing, but now the music has grown on me

person 1: Nooooooooo! You failed in the battle to not get that music stuck in your head to the point where you have to like it! What has become of this world
by Suteer Yarchaz January 16, 2010
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Bullshit ass ripoff of the true art form of Hip Hop
Retard: OMG, I Love MTV and Mainstream Rap
Me: Go Die
by A-Z September 3, 2006
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Someone that is on top of everything that's mainstream. This person knows about everything that is new and is quick to jump to anything that is new. A mainstream junkie can be good or bad.

The fake ones are the followers only doing it because the real ones (leaders) are doing it.
Wow, last year he liked Pop music, now he's on 50 cent's groan. What a Mainstream Junkie.

Did you hear that new Travis Porter. That shit is so dope and new. It's changing the way I think about certain things. Those guys are some Mainstream Junkies
by They Lazy Genius November 4, 2009
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Commercialized music that is extremely popular among people. Depending on the generation, mainstream music may be great or it may be garbage. As of the 2000's, mainstream has been garbage. Even more recently, Pop and generic rock music has overtaken Rap music, and the mainstream is at it's apex of garbage.

Mainstream music is contantly shat out by Hollywood, and what is considered piping hot now will be forgotten in a few years. For example, all of the boy-bands popular in the late 1990's to early 2000's are nowhere to be seen.

You can find many shat-out artists such as Lady Gaga plastered all over the Myspace home page.
Mainstream music is mainstream when Hollywood says it is.
by stay gold ponyboy April 16, 2010
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a person completely moulded by society, due to their innability to have a thought of their own
person 1: i thought you hated korn
person 2: they are number one on the chats this week
(a week later)
person 1: i thought you liked korn
person 2: they are so last week, i am so into britney right now
person 1: go pull your head outta your ass
by da_sbpiyda March 4, 2004
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