open-mouthed
/əʊp(ə)nˈmaʊðd
/adjective
With the mouth open, especially in surprise or excitement: taken aback, she could only stare at him open-mouthed open-mouthed astonishment...
- At the sight of our caravan of motor vehicles, the locals along the road stopped work and gazed open-mouthed in surprise and amusement.
- He stood there, open-mouthed, surprised that she was leaving.
- Any triumphalism, filtered through the eyes of a child, is open-mouthed in its surprise and gratitude.
Synonyms
astounded, amazed, in amazement, surprised, stunned, bowled over, staggered, thunderstruck, aghast, stupefied, dazed, taken aback, shocked, shell-shocked, in shock, nonplussed, speechless, dumbfounded, dumbstruck, tongue-tied, at a loss for words, agape, goggle-eyed, wide-eyed, staring
informal flabbergasted
British informal gobsmacked