up to one’s ears

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

1. Having an excessive or overwhelming amount of something. We're still unpacking our new house, so we're just up to our ears in boxes. If any of my guys get hurt at the construction site, I'll be up to my ears in paperwork.
2. Extremely busy with something; deeply or overly involved in something. There's no way I can take a vacation right now, I'm up to my ears in work at the moment! I only meant to be have a consulting role, but before I knew it I was in up to my ears in David's new business venture!
See also: ear, up
Farlex Dictionary of Idioms.

up to one’s ears

verb
See up to one’s eyeballs
See also: ear, up
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • up to (one's) ears in (something)
  • up to ears
  • up to one's ears
  • up to your ears in
  • be up to (one's) ears in (something)
  • be up to your ears in something
  • while we're young
  • link together (with someone or something)
  • leave (someone or something) in the hands of (one)
  • leave in hands