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A mysterious instruments played by the select few. It is the most important instrument of the low brass. The players get sick and tired of people asking what a Euphonium is, and most likely didn't tell you. That is why you are on Urban Dictionary.
Guy 1: What's a Euphonium?
Euphonium Player: *face palm*
Euphonium by A Euph Player March 11, 2011

euphonium player 

A very talented sexy musican who is a natural born kisser
That euphonium player is a sexy beast
euphonium player by talented man September 12, 2015
a low brass instrument with 3 or 4 valves that can be played in treble or bass clef. hardly anybody knows what it is so euphonium players often get tired of explaining it. they are usually the least ignorant section in low brass and the smallest and most talented section in the band.
band director: can someone please explain the coda to the trombones!?
euphonium section: we can! we can!
euphonium by honorband71 July 7, 2010
n. a large 3- or 4-valved brass instrument resembling a small tuba; it is similar to the baritone horn but, while the baritone has a cylindrical (straight) bore, the euphonium has a conical (grows larger as it progresses towards the bell) bore, warming up the sound
The euphonium has a dark, rich sound--except when too much garbage has been dropped down the bell.
euphonium by Civil Twilight 646 July 21, 2003

Euphoner 

A mixture of happiness while having a boner
I had a euphoner as a saw the playboy model walk by
Euphoner by Marquandala April 30, 2009
The single most important instrument in the low brass section of a band. The players are often anal about the performance of other band members epically trumpets, and they are often the best players in the band.
Band Director: Thank you Euphonium's for an exceptional performance.
Euphonium player: It would have been better but the trumpets egos got in the way!
Euphonium by euphsrock October 25, 2007
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Wanna go to meal hall & grab a plate of brown?
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fache-couture 

French slang, which translated, means "bull's fashion" but basically equates to "hyper trendy" or overly trendy. Used when a person wishes to express distaste at the latest fashion trend/fad, because it seems that everyone has a certain item of clothing or is wearing it. This term is most frequently heard in Paris but is slowly spreading to other parts of France.
1. That Burberry scarf is so fache-couture.
2. That purple American Apparel hoodie is so fache-couture.
fache-couture by bkgmh46x0x March 18, 2008
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