1. 'be right back'- i'll be back soon. usually used in chatrooms or msn when the sender needs to take a huge dump but is too scared to say 'i need to do poos'.
-a polite way of letting the other person/people know that if they send messages you aren't going to respond for a bit.
-a good way to delay a conversation if you are sick of them
basil: hey wat you up to tonight?
sherryl: brb
basil: neato
by juvenileinclination November 21, 2006
Used by Dave to say he will be back in an hour or two.
"brb"

*an hour passes*

"To HELL with your brb's, Dave >_<"
by Panich October 26, 2006
An expression used in IM (MSN, Facebook...etc) conversations. Though technically meaning "be right back", it is more commonly used as an excuse to leave a conversation with a person you don't want to talk to anymore.
Derek: Hi what's up?
Aliesha: Nothing much really...kinda bored...and I'll BRB...

Hours later:

Derek: I thought you said you would BRB...you lied!
Aliesha: No...i didn't lie
Derek: Then why did you comment on Facebook 30 mins ago??? You were still at the computer...you didn't want to talk to me...i see how it is
by aquastar8567 October 17, 2011
you're all fucking noobs, it means "Be ready BITCHES!"
Person A: imma touch you
Person B: quit it bitch!
A: Shut up or imma kick ur ass!
B: BRB!!!
A: Okay I'll fight you later, you ass!
B: You mathafucker it means "BE READY BITCHES"
So watch your ass
by asxddfghjkl June 03, 2011
BRB is an emcee based in Canberra, Australia. Originally from New Jersey in the US. He has performed in the US, Russia, Finland and along Australia's eastern coastline with peeps like Brethren, The Truth, Winnie Coopers and Joel Turner.

He emerged in the Aussie hip hop scene in 2005 with the release of the 'We're Metaphysical' EP by his crew Metaphysical Combat. Since then BRB has branched out as a solo artist.

He is also a producer and founded an independent production company, Metaphysical Productions, in 2006.
It's the BRB smackin you like you were the fourth stooge
by MCDUST May 01, 2010
Brb = Be right back
... = Silence

So the person who said brb... either
A) Wants you to disapear
B) Has something going on yet they dont know when they will be back
C) Something really odd is going on like if cyborg pirate ninja jesus was trying to sell them cookies
D) Adds on the ... without knowing what the damn thing means.

1)
Billybob: OMFG lost soooo much money at the dog races today.
Jimbobjoe: Well maybe you should bet on the rabbit next time! lulz
Billybob: Brb...

2)
Brandi: Hey Steve whats up!
Steve: n2m u?
Brandi: Nada brb...
by Your Hero October 19, 2007
An acronym some of my friends use to say "Bye"
1: brb
2: ok
.........
1 has just signed off
2: I thought so
by Felipe November 24, 2004

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