Do you work hard at your job, or at school/university?
Do you get lots of things done in your working day?
Then you can say that you “work your socks off!”
Examples of idiom “Work your socks off”
1. I’ve been working my socks off at work today! I started work at 7am and didn’t finish until 9pm!
2. Juan worked his socks off in school today. He was the first person to finish all of the exercises.
3. Maria was worried about the English exam, but she worked her socks off and did lots of revision so I think she will pass.