“BRB” stands for “be right back.” It is an abbreviation commonly used in online chats, text messages, and social media platforms.

The phrase is typically used to inform the other person that you need to step away from the conversation or activity momentarily but that you will return soon.

For example, if you are chatting with someone and need to take a quick break to answer the door, you might type “BRB” before stepping away from your computer or phone.

Alternatively, you might also use “BRB” to indicate that you need to take a break from a conversation or activity for a longer period, such as when you need to step out for a meeting or lunch.

Overall, “BRB” is a polite way to indicate that you will be away from the conversation or activity for a short time, while also reassuring the other person that you will be back shortly.