slack-jawed
Pronunciation:
adjective
Definitions
With the mouth in an open position and the jaw hanging loosely, especially as indicating bewilderment or astonishment.
Synonyms:dazzleddumbfoundedopen-mouthedstunned(by extension) Unsophisticated or unthinking; dimwitted in appearance.
Synonyms:dopeystupefiedstupidOverly talkative; indiscreet.
Synonyms:big-mouthed