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jawbone jaw·bone (jô'bōn')
The maxilla or, especially, the mandible.
An exclamation of indifference, nonchalance, etc: ''Ishkabibble,'' or ''I should worry''/It was a pretty abrupt transition from la belle epoque into the Space Age, but ish kabibble
[1921+; origin unknown; perhaps an alteration of Yiddish nit or nisht gefidlt; apparently introduced and perhaps coined by the comedienne Fanny Brice]