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 11, 2014
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"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
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A mostly Los Angeles latino street slang phrase acknowledging the importance of a speedy return. I'll be right back.
by malevolopolis February 28, 2015
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