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Definition of Shape up or ship out
1. Verb. (idiomatic) To either improve one's behavior or else be required to leave; to either improve one's performance in an activity or else withdraw from that activity completely. ¹
¹ Source: wiktionary.com
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1. Verb. (idiomatic) To either improve one's behavior or else be required to leave; to either improve one's performance in an activity or else withdraw from that activity completely. ¹
¹ Source: wiktionary.com