From Longman Dictionary of Contemporary Englishdo you understand?do you understand?UNDERSTAND spoken used when you are telling someone what they should or should not do, especially when you are angry with them Never speak to me like that again! Do you understand? → understand
Examples from the Corpusdo you understand?• I loved him, do you understand?• Oliver I have to be near her, do you understand?• I owe nothing to anybody, not gratitude or anything else, do you understand me?• You are mine, do you understand? mine.• What do you understand of my situation or my mind?• What do they understand of the temples themselves rising nearby?• I am very pushed for money, Alice - do you understand that?• Question, do you understand what it means to terminate the employment at will?