work (one's) butt off

To work really hard (on or at something). I know you thought it was just a silly New Year's resolution, but I've been working my butt off at the gym! Sally and Jim work their butts off when we hold our user conference—I don't know what I'd do without them!

Common Names:

Name	Pronounced	Usage
Maia (2)	MAY-ə (English), MIE-ə (English)	Roman Mythology
Abe (2)	-	Frisian, Dutch
Kennet	-	Swedish, Norwegian, Danish
Herschel	['hɜ:ʃəl]
Lihi	-	Hebrew
Glooscap	-	New World Mythology