eat up adj.
1. (US campus) tired out, exhausted.
|Campus Sl. Oct. 2: eat up – temporarily physically unattractive [...] Carol looked eat up and felt worse.|
|Sl. and Sociability 44: The meanings associated with many of these pictures of destruction are scattered in subject area — [...] eat up ‘fatigued’.|
|Online Sl. Dict. [Internet] ate up adj 4. burnt out or exhausted from the use of illegal drugs, usually ecstasy. (‘He’s really ate up from the rave last night.’).|
2. disorganized, messy, all over the place.
|Online Sl. Dict. [Internet] ate up adj 1. not ‘squared away’ (i.e. not organized or prepared, a mess.) If someone does something poorly, they’re ‘ate up’. Origin: the United States military. In the example phrase, ‘soup sandwich’ is an example of something messy. (‘You’re all ate up like a soup sandwich!’).|
3. (also eat/ate up with the dumb-ass) strange, unusual, crazy.
|Silence of the Lambs (1991) 36: You come talking that mushmouth, people say you eat up with the dumb-ass, girl.|
|Online Sl. Dict. [Internet] ate up adj 2. strange, stupid; WEIRD. (‘Don’t worry about Eric, he’s just ate up.’). [...] ate up with the dumb ass adj 1. strange, stupid; WEIRD. Origin: American rednecks. (‘Don’t pay any attention to him, he’s ate up with the dumb ass.’).|
4. keen on, obsessed with.
|Online Sl. Dict. [Internet] ate up adj 3. interested, to the point of near obsession. (‘He’s ate up about the military.’).|