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The Collaborative International Dictionary
big jaw

Actinomycosis \Ac`ti*no*my*co"sis\ ([a^]k`t[i^]*n[-o]*m[imac]*k[=o]"s[i^]s), n. [NL.] (Med.) A chronic infectious disease of cattle and man due to infection with actinomycetes, especially by Actinomyces bovis in cattle and by Actinomyces israeli or Arachnia propionica in man. It is characterized by hard swellings usually in the mouth and jaw. In man the disease may also affect the abdomen or thorax. Called also lumpy jaw or big jaw.

Usage examples of "big jaw".

His expression remained unchanged, but a small muscle in that big jaw made itself very evident.

Cooper had a big jaw, always jutted angrily, even when he was happy, which was rare unless he was with a woman and a bottle of tequila.

The horse chomped it down, big jaw rippling under his skin, then cocked his hip, dangled one hind hoof, and sighed hugely.

You looked over the problem and set that big jaw of yours and said, `I'll try!