what's eating you?

What's eating (someone)?

What's bothering someone? Why is someone in a bad mood? What's eating Terry today? I asked him how his weekend was and he just glared at me. I've never seen her act that way before. What's eating her?

See also: eating

what's eating you (or him or her)?

what is worrying or annoying you (or him or her)? informal

See also: eating