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quite simply..

be right back from the bathroom

gives a little more info than the standard brb, as a more definite time of return is understood here.
Tbone: omg i suck at chem
Bpat: yea you do
Tbone: brbftbr
Bpat: huh?
Tbone: chill out browski! back soon!
by Toe Moss November 28, 2007
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