be right back
As phrase used when one has to leave but intends to return very soon. Be right back, someone's knocking at the door. I have to use the bathroom—be right back.
BRB
An abbreviation for "be right back," a phrase used when one has to leave but intends to return very soon. Often used in texting or instant messaging. BRB, someone's knocking at the door. I have to use the bathroom—BRB.