1 - a certain even that sells all its tickets in a relatively quick period of time

2 - More commonly used to describe a person or music group (especially a metal or punk band) that quickly becomes popular and suddenly its original fan base turns away from them as the band has found a new niche market wordteenyboppers/word
1 - Tickets to the all blacks game sold out by noon

2 - Evanescene are now sell-outs. they now suck
by Brother Number One November 2, 2003
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someone who changes who they are/ style for approval or popularity of a person/and or people that can not be pleased and/or is never satisfied with them-self's.
Jen cheated Bob with Tom because Jen wasn't satisfied with bob and wanted more, so Bob study's Tom and switches up to a character similar to the Tom and try's to get her back, a sell out.
by cwise July 21, 2011
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A band, singer or muscian who changes their style of music to fit the trend/make more money.
Metalica are sellouts
by Rilo June 28, 2003
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1. In the eyes the very newest members of any band's fanbase: any band after any album they release; that same band once they work hard and earn the respect of a large-scale audience by giving the world music various types of people can enjoy. "HOW DARE THEY BE SUCCESSFUL? THE SELFISHNESS OF IT ALL! I WANT THEM TO BE BANKRUPT AND MISERABLE AND COMPLETELY UNKNOWN, THAT WAY I CAN RECOMMEND THEM TO PEOPLE WHO TELL ME 'Nah, I'll pass.' !"

2. A nonsensical term slung about by high school students to describe bands they have no true interest in (only their t-shirts) after the band released an album said fans were not even born early enough to experience. see also: False aging/wisdom/experience in a teenaged body

3. A band that truly is only in the music industry for the money see also: Metallica/Slayer/Tool/Avenged Sevenfold

4. A fan who is truly only in a fanbase for the sheer trendiness.
STEVE: "My kid brother's really into Metallica."
GREG: "Really? That sounds rich! Hey Alex, what did you think of Death Magnetic?"
ALEX: "Oh my fucking God, don't even get me started on that bunch of sell out nerds with a clear opera fetish! Trust me man, I was at their very first show back in nineteen-eighty-whatever and take my word for it: they haven't made a good album since Ride the Lightning, which was WAY better on vinyl, by the way!"
GREG: "Um, Alex, you were born in 1996. Records are obsolete and no one even makes record players anymore."
ALEX: "What's you point, faggot?"
by Zalgo the Destroyer October 23, 2010
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What envious underachievers call artists, writers, actors, or musicians when they no longer conform to their expectations.
Band X changed instead of staying exactly the same. They're sell outs!
by Killing Kittens June 5, 2004
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Doing something purely for the financial gain, Selling your soul
"Did Ice Cube sell out? You say hell no!" -- Ice Cube
by AC January 31, 2004
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