A mellophone is what french horn players march and play in marching band. It's like a trumpet with a horn bell. Trumpet players call it a trumpet on steroids. But really, a trumpet is an anorexic mellophone.
Trumpet Player 1: Man! What is that thing?!
Trumpet Player 2: It's a mellophone. AKA a trumpet on steroids.
Trumpet Player 1: Ohhh! That's funny!
Mello Player: Really??? 'Cause I heard you play an anorexic Mello??
by Marching_Horn_Mello_Rocks April 11, 2010
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a girl/guy who is incredibly unique and the other sections in the band hate but couldn't live without at the same time. Usually tend to be made of perverted, vulgar, out of shape, and funny individuals, who befriend everyone. They don't really take anything seriously and tend to joke throughout rehearsals but know their shit when competition comes around
flute player: omg did you see the mellophones they don't know what they're doing
low brass: naw the mellos are the shit
clarinet: they need to shut up
trumpet: mellophone is just a big trumpet
saxophones: wut
drum major: yea but they march hella good at competition
mellophone player: HELL FUCKING YEAH MAJESTIC AND SHIT
by treblemakingbandchick33 December 4, 2013
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An instrument commonly used for marching bands and drum corps. Basically a trumpet that has suffered both repeated instances of anal rape and consensual anal sex, resulting in a key of F, standing for Fucked in the ass. Often referred to comically as the prison trumpet by those who play trumpet, an instrument that has been spared vicious anal sex.
I'm a mellophone player, therefore I play an instrument that has been raped by me and dozens of other men at the same time resulting in an enlarged bell.
by Teehee1324 December 25, 2011
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A mom who is a crazy mofo that eats breakfast for dinner everyday.
"Oh my god Janice don't be such a mellophone mom."
"Stop judging me Harry and give me back my pancakes."
by XxMelloGodxX April 3, 2016
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The greatest instrument in the marching band. Other sections are incredibly jealous of the mellophones, and often their girlfriend s will ditch them to sit with the mellos.
Trumpet player: Ahh dude. My gf left me for that mello player.

Trumpet player 2: maybe if I player mellophone my mom would like me
by Lostduty June 21, 2022
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