تعريف shape up or ship out في الإنجليزية الإنجليزية القاموس.
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
Portions of those letters quoted by Bruccoli indicate that though Hemingway could be sympathetic, he used a lot of ink telling Fitzgerald to shape up or ship out.