to have a lot of sth to deal with :
We're up to our neck in debt.
He's in it (= trouble) up to his neck.
to have a lot of sth to deal with :
We're up to our neck in debt.
He's in it (= trouble) up to his neck.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005