what's eating someone

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 someone

People ask what's eating someone, when they want to know why that person seems to be unhappy or angry. `What the hell's eating you?' he demanded.
See also: eating