stiff up
In real, traceable use. Part of the curated seed collection; community review is coming.
Sense 1
Meaning · English
To apply rubber without oil as part of the French polishing process.
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).
Sense 2
Meaning · English
Synonym of stiffen up.
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “stiff up” mean?
To apply rubber without oil as part of the French polishing process.
Is “stiff up” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.