tell me how you really feel
The expression "tell me how you really feel" is said in sarcasm and irony after someone has said an anger or hate-filled statement, drawing attention to the anger and hatred (and implicitly mocking it).
Jon Stewart: Deep dish pizza is not only not better than new york pizza; it's not pizza. It's a fucking casserole. ...Chicago, I love your city, it’s one of my favorite places to visit… but deep-dish pizza is like a huge, crusted-over pile of diarrhea
Audience member: Damn Jon, tell me how you really feel
Audience member: Damn Jon, tell me how you really feel