1. Expression：ship out
Explanation：To leave or depart to some distant location. （离开到遥远的地方去）
Example： The package shipped out on an express carrier last week so it should have reached you by now.
I'm getting pretty sick of your crummy attitude, mister! If you want to stay under this roof, you need to shape up or ship out!
In the morning you'll be shipped out with the rest of the scum.
As soon as they finished basic training, the federal government shipped them out.
2. Expression：shape up
Explanation: To reform or improve one's actions or behavior. （改变或改善行为）
Example：You're on thin ice! If you don't shape up immediately, we're going to have to expel you.
I know I haven't been the best father in the world, but I'm trying to shape up.
He told them they better shape up or they'll get a pink slip.
I guess I'd better shape up if I want to stay in school.
3. Expression：jump the gun
Explanation：To start something before it is permissible, appropriate, or advisable. （过早开始行动，草率行事）
Example：Henry jumped the gun and sent the proofs to the printer before the boss approved them, and she was not happy.
I probably jumped the gun with announcing our engagement before everyone was there, but I was just too excited.
We certainly jumped the gun when we packed our winter clothes away the first warm day in March. Two days later it turned cold and six inches of snow fell. We had to get the clothes out again.
My wife saw me in a restaurant having lunch with a female client. Not knowing who my client was, she jumped the gun and accused me of having an affair. I had a hard time convincing her it was purely business.