what the hell is wrong with you?Very informal and vulgar. Used to express annoyance, confusion, or disbelief at someone's behavior. มึง is a rude form of “you,” so use only with very close friends or in confrontational speech.
TH: มึงทำอะไรของมึงเนี่ย ทำไมถึงพูดแบบนั้น
EN: What the hell is wrong with you? Why would you say that?