Noun
The part of a musical or other instrument to which the mouth is applied in using it; as, the mouthpiece of a bugle, or of a tobacco pipe.
An appendage to an inlet or outlet opening of a pipe or vessel, to direct or facilitate the inflow or outflow of a fluid.
One who delivers the opinion of others or of another; a spokesman; as, the mouthpiece of his party.
Source: Webster's dictionaryThe mouthpiece of the half-inarticulate, all-suggesting music that is at once the very soul and the inseparable garment of romance. Walther von der Vogelweide
I'm sick and tired of these despicable Republican attacks that always seem to come from those who never can be found to serve in war, but love to attack those who did. I'm not going to be lectured by a stuffed suit White House mouthpiece standing behind a podium... John Kerry
As Bob Dole found out, you can't keep a positive image while being your party's mouthpiece in Congress. That's why no legislative leader since James Madison has ever been elected president. Dick Morris
One bites into the brass mouthpiece of his wooden cudgel, and the other blows his cheeks out on a French horn. Do you call that Art? Franz Schubert
Pointed threats, they bluff with scorn Suicide remarks are torn From the fool's gold mouthpiece the hollow horn Plays wasted words, proves to warn That he not busy being born is busy dying. Bob Dylan
Everyone says how Calvin and Hobbes is about a real kid, to me there's nothing real about it; it's an adult using a kid's body as a mouthpiece. Bill Griffith