chase your tail
白费力气或浪费时间在无休止或无用的活动上
口语·形容忙碌但毫无进展的状态
英文释义
to engage in a repetitive or futile task, often without making any progress
例句
I've been chasing my tail all day trying to organize these files.
典故来源
源自狗追逐自己尾巴的徒劳行为，比喻做无意义或重复无效的工作。