be good, and if you can't be good, be careful Meaning in Cambridge English Dictionary
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Meaning of "be good, and if you can't be good, be careful" - English Dictionary

be good, and if you can't be good, be careful

humorous saying
used to tell someone to enjoy themselves at an event or during an activity, but not to take risks
(Definition of be good, and if you can't be good, be careful from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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