Artificial intelligent assistant

jaw-fallen

ˈjaw-ˌfallen, a.
  [f. jaw n.1 + fallen pa. pple.]
  Having the lower jaw fallen or hanging loose; chop-fallen; dejected.

1603 Florio Montaigne i. xl. (1632) 128 The wench offered him was jaw-falne, long-cheekt, and sharpe-nosed. a 1691 J. Flavel Sea-Deliv. (1754) 165 We were jaw-fallen and starved with the extreme cold. 1748 Richardson Clarissa (1811) III. 54 (D.) The people..seemed by their jaw-fallen faces and goggling eyes to wonder at beholding a charming young lady.

Oxford English Dictionary

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