Definition
To be extremely busy or overwhelmed with a particular task or activity.
忙碌不已
She's up to her eyeballs in wedding preparations lately.
她最近忙於婚禮的準備工作。
During finals week, I'm up to my eyeballs in studying every day.
在期末考試週，我每天都忙於學習。
We've been up to our eyeballs in work since the new project started.
自從新項目開始以來，我們一直忙於工作。