up to one's neck

up to (one's) neck in (something)

Having too much of something; overwhelmed by an excessive amount of something. I'm still unpacking my new house, so I'm just up to my neck in boxes. If any of my guys get hurt at the construction site, I'll be up to my neck in paperwork. There's no way I can take a vacation right now, I'm up to my eyes in work at the moment!
See also: neck, to, up
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

up to one’s neck

mod. filled up with something. I am up to my neck in other people’s grief and anguish.
See also: neck, to, up
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.