Ireland has discovered slang.
Not only has she discovered it, but she's inventing her own.
Lately, without apparent reason, she has been referring to things as "too deep". Things that normally aren't referred to by their depth.
For example, she can't pick up her mess or clean a room because they're too deep.
We have yet to pin down exactly what the phrase means. But context clues teach us that it referres to a negative quality.