work someone's butt off
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
Synonym of work someone's ass off.
Register: slang, vulgar
Where it’s used:
Used
American English
Examples
Her son, Dominic, had been ranked third at the end of his junior year, but had “worked his butt off this year,” she said.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “work someone's butt off” mean?
Synonym of work someone's ass off.
Is “work someone's butt off” formal or informal?
work someone's butt off is generally slang, vulgar.