(Do) you hear me?
Are you going to obey my instruction or command? Do you understand exactly what I'm telling you? You cannot borrow the car without my permission, or you'll be grounded for a month—do you hear me? You are not to visit that woman anymore, you hear me?
(do) you ˈhear me?
(spoken) used to tell somebody in an angry way to pay attention and obey you: You can’t go — do you hear me?