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The short term for 'Be Right Back' which usually means that people have told their friends via text or internet based social services that they have gone somewhere for a brief period of time which usually stand for the time of up to half an hour unless they've said that it would be longer. Although in some cases, the term of BRB can also mean that they have gone for more than 6 hours without any hint of what they are doing, which usually suggests that they are having a hard time trying to masturbate properly.
Dave - Hi Josh do you want to go online in a sec?
Josh - Yeah sure but brb, going to get some food.
Dave - OK :)
/////////////////////
8 Hours Later
/////////////////////
Josh - I'm Back
Dave - Where the hell have you been? To the other side of the planet and back?
Josh - No I went to watch about 20 movies and never mentioned it to you because I couldn't be asked telling you.
Dave - Ok :(
by Anonymous XY January 04, 2014
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An abbreviation for "Be Right Back". Some people use it correctly and some use it as a substitute for leaving a conversation.
Correct Usage:
Ryan: so i saw this prosty in the street

Vinny: brb
Ryan: ooooooookee
-2 Minutes later-
Vinny: back, as you were saying?
Ryan: YAY!

Incorrect Usage:
Ryan: i farted and i could feel something warm in my pants :(
Smithy: brb
-Smithy doesn't return-
*1 hour later*
Ryan: smitheee?, you there?
by Mysta D September 28, 2010
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4
"Be right back." No longer taken literally, people just say it when they are going to be gone for any amount of time, whether it be 20 seconds or 20 minutes.
Random person: brb
gs68: ok

<45 seconds later...>

gs68: Screw you! *leaves*

<2 hours later...>

Random person: back...hey were did dat fagot go
by gs68 December 21, 2004
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5
Short for brb, which some people use literally, and are gone anywhere from 3 seconds to 5 minutes. Some people, however, use it much more loosely, and will be gone for hours on end, and usually come back making a truly shitty excuse for why they were gone so long. Used mainly in IM conversations.
1. Proper usage
Person #1: LOL
Person #2: I'll brb, gotta take a shit
Person #1: kk
---1 minute later---
Person #2: k back
Person #1: coo

2. Improper usage
Person #2: LOL
Person #1: brb
Person #2: alright
---15 minutes later---
Person #2: ...hello...?
---45 minutes later---
Person #2: you there!?
---4 hours later---
Person #1: I'm BAAAAACK!
Person #2: What were you doing? Scratching your genitals?
Person #1: NO! Never, I would never ignore you! I was... uh... painting my toenails?
Person #2: psssh *signs off*
by MrCuddles November 19, 2006
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An Acronym for "be right back," according to Netiquette should be used for an absence less than or equal to ten minutes, if the allotted is above that then bbiab should be used instead if you're not logging off, otherwise use bbl
(1:55:41 PM) randgirl323: brb.
(1:55:59 PM) randguy213: mkk
(2:05:34 PM) randguy213: so much for brb =\
(2:05:43 PM) randgirl323: oh, sorry :
by neverkn0wsb357 January 10, 2009
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7
When someone doesn't feel like talking to you...
Me: Hey, what's up!?
Person: Nothing.
Me: Oh that's a shame!
...
Me: So what's new?
Person: Nothing much.
Me: Cool!
Person: brb
Me: Okay! :)

*Person signs off, never to return*
by Dr. Onuki December 22, 2007
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