Definition of "jaw-breaker" []

• A word hard to pronounce. (noun)

The Century Dictionary (Public Domain)

• ""I can sure read and spell, an 'I know that Chechaquo means tenderfoot, but my education never went high enough to learn me to spell a jaw-breaker like that.""
• "Mixed treats from the Palin jaw-breaker candy jar:"
• "UNIDENTIFIED MALE: So when it says "jaw-breaker," it has a question mark."