SLANG: BRB

Those were the days...

BRB

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BRB (Be Right Back) is one of the more polite online abbreviations; respectfully letting fellow chatters know that you’ll be taking a brief vacation from your keyboard.
Traditionally, however, BRB refers to a Big Red Button, an important, non-descript button associated with a power, reset, detonation, self-destruction, emergency shut-down, or ejection switch. The only real rule for the BRB is “do not press,” unless it’s an extremely dire situation, of course.
One of the most interesting uses occurred during the Cold War, when the BRB was used in fictional writing to describe a device that could launch doomsday, an all-out nuclear catastrophe.
Other Big Red Buttons have been used in car ignition, computing and cartooning. The BRB has even been featured in an iPhone app.

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