in over one's head

see under in deep, def. 2.

See also: head

Name	Pronounced	Usage
Uriasz	UWR-yahsh	Polish
Avelina	-	Ancient Germanic (Latinized)
Zuzen	-	Basque
Zhen	-	Chinese
Eustace	YOO-stəs	English
Arnot	['a:nət]