mouthpiece

[mouth-pees] /ˈmaʊθˌpis/
noun
1.
a piece placed at or forming the mouth, as of a receptacle or tube.
2.
a piece or part, as of an instrument, to which the mouth is applied or which is held in the mouth:
the mouthpiece of a trumpet.
3.
the part of a bit or bridle, as for a horse, that passes through the animal's mouth.
4.
a person, newspaper, etc., that conveys the opinions or sentiments of others; spokesperson.
5.
Slang. a lawyer, especially a criminal lawyer.
Origin
1675-85; mouth + piece
Can be confused
ambulance chaser, mouthpiece, pettifogger, shyster.
Examples from the web for mouthpiece
  • In this case, the conundrum is how to keep your water from freezing in the narrow tube between your pack and the mouthpiece.
  • To cool the smoke, a damp cloth was placed over the mouthpiece as a filter.
  • He plays no part in climate change other than being a mouthpiece.
  • Gun-control groups accused him of being a mouthpiece for gun makers, but did not refute his findings.
  • Squeeze the rubber mouthpiece to trap the water and shake the snorkel to rinse out its insides thoroughly.
  • Blood was smeared across his lips and onto his mouthpiece.
  • It is then drawn into a rubber hose and into a mouthpiece from which it is inhaled.
  • He got a mouthpiece from his dentist to wear at night, but it doesn't help.
  • To hear better on your cell phone, cover the mouthpiece.
  • Then he places mouthpiece to lip and, if the instrument is not too leaky, ripples out a modernist roulade.
British Dictionary definitions for mouthpiece

mouthpiece

/ˈmaʊθˌpiːs/
noun
1.
the part of a wind instrument into which the player blows
2.
the part of a telephone receiver into which a person speaks
3.
the part of a container forming its mouth
4.
a person who acts as a spokesman, as for an organization
5.
a publication, esp a periodical, expressing the official views of an organization
6.
(boxing) another name for gumshield
Word Origin and History for mouthpiece
n.

also mouth-piece, 1680s, "casting fitted on an open end of a pipe, etc.," from mouth (n.) + piece (n.). Meaning "piece of a musical instrument that goes in the mouth" is from 1776. Sense of "one who speaks on behalf of others" is from 1805; in the specific sense of "lawyer" it is first found 1857.

Slang definitions & phrases for mouthpiece

mouthpiece

noun
  1. A lawyer; lip: inability to hire a professional bondsman and ''good front,'' ''mouth-piece'' or lawyer (1857+)
  2. A spokesperson: Each tong has an official ''mouthpiece'' (1805+)