play fast and loose
玩弄花招,不守規矩或不誠實對待某人或某事
口語·指責不守規矩
英文釋義
to behave in an irresponsible or unpredictable manner
例句
You can't play fast and loose with the rules and expect to keep your job.
典故來源
源自16世紀一種街頭騙局,騙子快速移動繩子讓觀眾猜中圈套,后指行為反復無常、不負責任。