Top Definition
Take off the slide of a trombone, put a mouthpeice into the hole where the slide goes. TAADADADAA!!!!!!!!!

Resembles a euphonium/alto horn when bell points backwards
Trombonist: I was so bored at band camp i played tromphonium

All other band members: (shiftty eys) Yes, indeed...????~~!!!

Drummers: huh?
by Hsdfdfghfadfdf April 21, 2007
5 Words related to tromphonium

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×