Green’s Dictionary of Slang

eat up adj.

also ate up
[SE eaten up/eat up v.]

1. [1970s] (US campus) tired out, exhausted.

2. [1990s+] disorganized, messy, all over the place.

3. [1990s+] (also eat/ate up with the dumb-ass) strange, unusual, crazy.

4. [1990s+] keen on, obsessed with.