(something) is over (one's) head(redirected from are over their head)
(something) is over (one's) head
1. Something is too complicated to be understood by one. My jokes are always over Stephanie's head, so I'm glad you think I'm funny at least. A lot of this technical stuff is way over my head.
2. Something is lingering as a source of concern or worry for one. I'm so glad that exam is finally over—it's been over my head for months.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.