Not just someone who sells out their music.....also can be used when friends backstab you, or ignore their own self imposed belief system of morals and ethics and do something that they never ever said they would.
'But he said wouldn't'
'Yeah well he's a fucking sellout'
by Johhny Rogers December 7, 2003
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when a person (most oftenly a musical artist) comprimises their beliefs to further their success and make loads of money. However, this is not to be confused with when a band that you liked, that was perviously not popular, becomes popular.
britney spears sold out when she decided to take off all of her clothes in order to see more albums.
by Rachel December 11, 2003
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I don't think I agree with this general definition here. When I think "sell out", I don't think of someone who blew up out of popularity. Most of the time, they have no choice over that, so its not fair to them and it makes the labeler look like a hater. Plus, what if that was their goal right from the beginning? You're basically chastising them for having hopes and dreams.

When I think of a sell out, I think of someone who vehemently spoke out against something or people who did something but later turns around and does the same thing. That is also a hypocrite.

There's nothing wrong with wanting do really well for yourselves. Like I said before some of these people had no choice and if you care for the actor, band, etc. you would be glad their talent got them where they are. I mean, we all have dreams, and we all gotta eat and fend for ourselves. If you have a talent, by all means flaunt it.

And trust me, I know how bad it feels when stupid people get a hold of your favorite band, but again that's not the band's fault and there will ALWAYS be a stupid bunch a group, period. No other way around it.

But when people actually talk about how stupid someone is, or how wrong one profession is, then later decides that they want to be in that profession or be that person's friend, that's when I have a problem. That's not attractive, at all. That's trifling, wishy washy, and fake.
Sally: What is that what Jack is wearing?

Jan: Oh, those are his new Prada loafers, don't they look nice?

Sally: That fucking sell out, he was just telling me a few months ago how he hated designer labels because the methods they used to make their products.

Sally: Wow, what a dick.
by maddywoo December 22, 2010
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When Metallica bitched about their fans trading their music online because they weren't getting paid, they became sell outs.
by dammit janet July 1, 2003
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Compromising your integrity, usually for money. Its that simple. This word is mostly used to describe bands that go mainstream.
Green Day aren't sellouts because despite their recent popularity, they never changed their sound. They were just never very good...
by Crak March 26, 2005
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1. A band that changes it's style for stupid teenybopper girls and getting more money, even though they already have tons of it.

2. A word used by teenaged wannabe goths/punks to sound hardcore. Those people usually come up with bullshit reasons like "WE DON'T WANT TO CONFORM TO SOCIETY" and say "THEY BECAME POPULAR AND STARTED TO SUCK".
1. Good Charlotte, Maroon 5, Blink 182.

2. "OMG OMG I WANT TO SOUND HARDCORE I CRAVE TO BE HARDCORE SO I SAY THEY ARE A SELL OUT".
by Blahb February 19, 2005
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An individual or a group of individuals who compromise their integrity and their values solely to make money and for publicity than for artistic merit; 50 cent, P Diddy, Jermaine Dupri, etc
50 cent doesnt even deserve an example hes such a fucking sell out.
by stolitch October 23, 2007
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