shape up or ship out
要么改变状况，要么离开
口语·警告改进否则离开
英文释义
to improve one's behavior or performance, or else face the consequence of being forced to leave or be dismissed
例句
The coach told the team: shape up or ship out if you can't follow the rules.
典故来源
源自20世纪美国海军用语，要求士兵改进表现（shape up）否则被遣送离队（ship out）。