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quiet as a mouse
Language:
en
1.
US
UK
Australia
General English
informal
colloquial
Extremely quiet or silent; making little or no noise.
2.
US
UK
Australia
General English
informal
colloquial
Very unobtrusive, meek, or well behaved; showing little outward activity or disturbance.
Examples:
No examples available.
Validation Count:
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Sourced from Wiktionary