work something off
phrasal verb with work verb uk/wɜːk/ us/wɝːk/
（通过消耗体力）摆脱，发泄（不愉快情绪）
If you work off an unpleasant feeling, you get rid of it by doing something energetic.
She works off stress by running for at least half an hour every day. 她通过每天跑步至少半小时来缓解压力。