long as one's arm
Proposed by a contributor, not yet supported by evidence.
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 “long as one's arm” mean?
Very long.
Is “long as one's arm” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.