funny business

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释义
不道德的行为；不规矩的事
unethical practices

例句
Landlord : Make sure you get the whole $825.No funny business down there, gansta.(2 Broke Girls)
房东：确保把所有的825刀全部捡起来。别在下面搞小动作，小太妹。（破产姐妹）