what's your problem?

What's (someone's) problem?

Why is someone being so rude, unreasonable, or difficult? Jeez, what's his problem? All I said was hello, and he stormed out of the office. Hey, what's your problem, pal? You can't cut ahead of people in the line!

what’s your ˈproblem?

(spoken, informal) used to show that you think somebody is being unreasonable: What’s your problem? I only asked if you could help me for ten minutes.