timid as a mouse
Proposed by a contributor, not yet supported by evidence.
Register: colloquial
Where it’s used:
Used
American English
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “timid as a mouse” mean?
Very timid.
Is “timid as a mouse” formal or informal?
timid as a mouse is generally colloquial.