you (must) have mistaken me for someone who gives a shit

you (must) have mistaken me for someone who gives a shit

rude I don't care in the slightest about what you are saying. A: "Please don't discuss that topic on the air. You might offend some of our listeners." B: "Oh, I'm sorry, you must have mistaken me for someone who gives a shit." A: "I'm sorry, boss, but I don't know if I'll have the project done on time. I'm just dealing with a lot of personal issues." B: "You've clearly mistaken me for someone who gives a shit. Get it done by Friday, or you can look for a new job."
See also: give, have, mistaken, shit, someone, who

You must have mistaken me for someone who gives a shit

and YMHMMFSWGAS
sent. & comp. abb. What makes you think I care about what you are saying? (Usually objectionable.) So you’re unhappy. Why tell me. You must have mistaken me for someone who gives a shit