shape up or ship out

listen to the pronunciation of shape up or ship out
İngilizce - Türkçe
Ya bu deveyi gütmeli, ya bu diyardan gitmeli
İngilizce - İngilizce
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.