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
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

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, someone
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
See also: