up to your neck in something
idiomPart ofneck
up to your neck in something — idiom
1. To have too much of something to deal with, especially work or problems.
1.idiom
Definition
To have too much of something to deal with, especially work or problems.
Example
Amira is up to her neck in deadlines this week and cannot take any new projects.
The company is up to its neck in debt and may have to close soon.