Sousaphone

[Renato]

The sexiest instrument in the entire world, next to the [tuba]. These instruments are so [studly] that anyone that plays one is instanty recognized as a god, stud, or [downright] playa.

[Julene]

a large tuba (= a metal musical instrument played by blowing) with tubes that go round the players body, sometimes used in marching musical groups

[Luis Fok]

A form of tuba with a wide bell pointing forward above the players head and circular coils resting on the players left shoulder and right hip, used in marching bands.