over sb．'s head
1．not understandable不可理解
The lesson today was too hard；it went over my head．今天的课太难，我不懂。
His writings go over my head．他写的东西太深，我理解不了。
2．to a more important person in charge；to a higher official越级报告或请求
The thing was settled over his head．这事没与他商量就处理了。
Going over the head of his editor，the auther appealed to the publisher．作者越过编辑，直接向出版者申诉。