belt up
In real, traceable use. Part of the curated seed collection; community review is coming.
Sense 1
Meaning · English
To fasten one's seat belt.
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Sense 2
Meaning · English
To stop talking or chattering; to shut up.
Register: colloquial, derogatory
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Sense 3
Meaning · English
To beat up (someone).
Register: slang
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “belt up” mean?
To fasten one's seat belt.
Is “belt up” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.