be up to (one's) eyeballs in (something)
To have too much of something; to be overwhelmed by something. I'm still unpacking, so I'm up to my eyeballs in boxes. If any of my guys get hurt at the construction site, I'll be up to my eyeballs in paperwork.
be up to your ˈeyes/ˈeyeballs in something
have a lot of something to deal with: He was up to his eyes in debt.