what's eating you?
what's eating you? (English) — An expression used when it's obvious that another person is upset, frustrated about someone or something. slang
When you say 'hi' to someone and they get mad and start ranting might be, "What's eating you?"
The literal idea might be of an actual parasite that is causing pain and discomfort (while eating you).
what's eating you? — sorun ne?
"what's eating you?" in lyrics
You will only break my heart
Tell me your thoughts now baby
Tell me what's on your mind
Tell me what's eating you alive
Tell me your latest story
What will it be this time