flat as my hat
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
Synonym of flat as your hat
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 “flat as my hat” mean?
Synonym of flat as your hat
Is “flat as my hat” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.