The complete opposite of coming RIGHT back.
Sister: "Hey, will you watch child's name while I go to place? I'll be right back.

Me: *waiting for three or more hours*
by _asdfjkl_ December 12, 2014
"GARREN;" I'll be right back! is when Garren Benfield's father shouts his name and the beats his mic up with a bat or some shit, then fucking leaves for 5 million years and finally comes back onto xbox chat 1 eternity later.
"GGGGGGGGGAAAAAAAAAAAAAAAAAAAARRRRRRRRRRRRRRRREEEEEEEEEEEEEEENNNNNNNNNNNNNNNN!" Oh god, it arrives. *nuclear explosion* "I'll be right back!"............. "Ok I'm back." "GARREN; I'll be right back!"
by The Dankster #87 October 10, 2019
Meaning: I have more important things to do than waste oxygen on you right now.
"Awe bra, I'll call you right back in 10 minutes (wahaha, idiot. Get rekt)" - Wayne the gay
by Jimbob McGraw November 24, 2021
A mostly Los Angeles latino street slang phrase acknowledging the importance of a speedy return. I'll be right back.
by malevolopolis March 1, 2015
The one who says this can return whenether they want
I'll Be Right Back
by I'll BRB November 3, 2022