A vague but derogatory term blindly used by music "fans" to describe bands who make (or have managers who make) a new lucrative and/or artistically experimental decision (for example: accepting a product endorsement, a change in the band's expected composition style, switching to a larger record label, dressing with more class, speaking out against mass mp3 piracy, etc.) The word is sometimes also applied to bands who simply get more commercial success through no additional effort.

The anger comes from the false belief that fans "own" their favorite entertainers, that these entertainers are thus not real humans with free will, and the feeling of grief when some CD that the listener previously enjoyed alone is now enjoyed by millions of more people.

(Note that "sellout" ONLY applies to those who make a living in the fine arts. For example, a software engineer who accepts a job promotion and higher salary is never branded as a "sellout". Nor is a professional athlete who appears on a box of Wheaties.)
Actual quotes from an old friend:

(1993) "Damnit, Smashing Pumpkins is such an underrated band. They never get played on the radio!"
(1994) "Damnit, Smashing Pumpkins are always on Mtv and the radio now! They're such sellouts."
by Bill M. July 29, 2004
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Just want to make it clear tat because an artist's song is used in a commercial (like Back in Black}in that shitastic gap jean ad) doesn't mean the band has a soldout. The record company often owns the rights to the song and gives the Advertising Agency the right to use it.
The Gap Sucks!

Sellouts Suck!
by NoBody Joe October 15, 2006
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A band who abandons there morals and sells to corporations making music for money rather than because they enjoy it/ they want to get there point accross
look in the charts, anyone who claims to be alternative etc. genrally
by Anonymous August 10, 2003
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some one who changes for money
if my band became famous and then people started likeing other music so we started playing that even though we dont like that kind of music just for more money
by josh September 5, 2003
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Apparantly any band who gets a record deal, gets a video on mtv, or has lots of fans.

Extremely over used by children who dont know what it means
rob: whatre you listening to?
john: red hot chili peppers
rob: FUCK those sellouts
john: your an idiot...
by jackmantal December 13, 2006
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Johnny Damon is a sellout. He said he would never play for the Yankees, and look where he is now.
by Jordan Stevens May 11, 2007
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50 CENT
He sold out his fans just so he'd make more money. Now all he talks about is women, sex, head, and ass.
Guy 1: Candyshop...What a sellout?
Guy 2: Now he's a wanksta.
by Footpaul January 13, 2006
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