If someone is looking open-mouthed, they are staring at something with their mouth wide open because it has shocked, frightened, or excited them.
They watched almost open-mouthed as the two men came towards them.
The finale had 50,000 adults standing in open-mouthed wonderment.
Synonyms: astonished, surprised, shocked, amazed More Synonyms of open-mouthed
open-mouthed in British English
adjective
1.
having an open mouth, esp in surprise
2.
greedy or ravenous
3.
clamorous or vociferous
open-mouthed in American English
(ˈoʊpənˌmaʊðd; ˈoʊpənˌmaʊθt)
adjective
1.
having the mouth open
2.
gaping, as in astonishment
3.
clamorous
Examples of 'open-mouthed' in a sentence
open-mouthed
Everyone stared open-mouthed when he said that.
The Sun (2006)
There must be many thousands of small businessmen hearing this with open-mouthed astonishment.
Times, Sunday Times (2007)
Not one number failed to leave fans open-mouthed.
Times, Sunday Times (2006)
But you can only stand open-mouthed at the naivety of this particular suggestion.
Times, Sunday Times (2009)
I stared at it open-mouthed until the time ran out.
Times, Sunday Times (2015)
Tommy Sloane let his team of crickets escape him altogether while he stared open-mouthed at the tableau.
LM Montgomery Anne of Green Gables (1872)
That will leave them open-mouthed.
Times, Sunday Times (2008)
Its brilliance leaves you open-mouthed.
Times, Sunday Times (2007)
Dirty Grandpa is a comedy that will leave you open-mouthed.
The Sun (2016)
I stared open-mouthed from the kerb.
Times, Sunday Times (2012)
He probably jets off to foreign countries to save lives; she makes intellectual leaps that leave him open-mouthed in admiration.
Times, Sunday Times (2015)
He has got that ability to turn a game in an instant - often with something that genuinely leaves you open-mouthed.
The Sun (2013)
The flat lead characters make it difficult to understand how the catastrophic ending comes about, but the film is flamboyant enough to leave you open-mouthed anyway.