from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A talkative person.
- n. An orator.
- n. A demagogue.
from The Century Dictionary and Cyclopedia
- n. One who works with his jaw; especially, a loud-mouthed demagogue: originally applied to an official “orator” or “instructor” of the Knights of Labor.
jaw + smith (Wiktionary)
Obama was the more substantive jawsmith and, frankly, most presidential in demeanour.