Today's idiom is good If you have a bad employees who do not work well for whatever reason. It is also good for people in your life that bother you.
" shape up or ship out "
* This means to improve performance on the job, if not they must leave the job.
* If someone's attitude / behavior does not change then they will have to leave the situation.
Example 1
A. The new mechanic comes late everyday.
B. I know. He will have to shape up or ship out .
Example 2
I can not accept my girlfriend drinking every night. If she does not shape up , she needs to ship out.
https://dictionary.cambridge.org/dictionary/english/shape-up-or-ship-out?q=shape+up+or+ship+out%21
https://idioms.thefreedictionary.com/shape+up+or+ship+out