SYBAU is a youth slang term that stands for the English phrase "Shut Your Bitch Ass Up," typically meaning "Halt your mouth" or more bluntly "Shut up." In German usage, it is usually meant humorously or ironically, but it can come across as insulting depending on the context and the relationship between speakers. It appears in social media comments, forums, and messages, and its intensity can vary with tone and audience.
