what does sybau mean in text

The acronym "SYBAU" stands for "Shut Your Bitch Ass Up." It is typically used in text or online chats as a blunt, rude, and dismissive comeback to tell someone to be quiet. While it can be used playfully among close friends (sometimes like roasting), it generally carries a harsh or confrontational tone and is considered impolite, especially in public or with strangers. The meaning may vary with context, but it is mostly an aggressive way to shut someone down in conversation.