BRB" is an abbreviation that stands for "Be Right Back." It is commonly used in text messaging or online communication to indicate that the sender is temporarily stepping away from the computer or phone but will return shortly. It's often used as a polite way of acknowledging that you need to step away but will respond soon. It is like other acronyms that are used by the Gen Z. The abbreviations are really helpful when you are in a hurry and you need to reply to someone. Be right back is brb meaning in text.