Definition
To make a concerted effort to improve one's performance or behavior, especially when it is not meeting expectations.
努力改善行為或工作
He needs to pull his socks up if he wants to keep his job at the company.
如果他想保住公司的工作，他需要更加努力。
Her performance has improved significantly since she was told to pull her socks up.
自從她被要求改進之後，她的表現有了顯著提升。
You need to pull your socks up for this exam if you want to get a good grade.
如果你想取得好成績，你需要為這次考試更加努力。