I told him, " Shape up or ship out."

我告诉他，“要么改进，要么走人。”

She or he might add a threat by saying shape up or ship out.

她或他可能会带上威胁，说“要么改进，要么走人”。

He told Dr. D to shape up or ship out.

他告诉 D 博士要么振作起来，要么就离开。

There's a common expression " Shape up or ship out." " To shape up" means to improve.

有一句俗语“Shape up or ship out”。“To shape up”的意思是改进。