up to one's neck 手边的事情太多，忙得不可开交

　　I'm up to my neck right now. Don't tell me about the party.

　　我现在忙死了，别跟我说聚会的事情！

　　Mike is up to his neck in paperwork.

　　各种文书工作可把麦克忙坏啦。

　　疯狂练习吧！