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Stands for "Prolonged Rocket Boost", which is a very advanced racing technique used in the game Mario Kart DS for the Nintendo DS that allows the driver to go off-road while still maintaining maximum speed.

There are two ways to achieve PRB:
1. Get a perfect start boost and snake perfectly (good enough so that your kart is constantly at full maximum speed). Continue to snake perfectly onto the off-road section you wish to cut across.

2. Snake perfectly after leaving a rainbow zipper without ever slowing down.

Any loss in speed whatsoever or use of a mushroom will end the PRB. The Karts best built for PRB are the Dry Bomber and Egg1, however it is possible with many more, such as the Standard DS, Standard YS, ROB-BLS, Poltergust 4000, and even more if you've got ultra skills in the game.
I just did 3 full laps of PRB on SNES Mario Circuit 1!!!!
by Chuck Nastee August 13, 2008
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Almost same like BRB just slightly different!

Its called Pee Right Back!
When u need to take a piss! u say: PRB!
by Peter swart January 14, 2014
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its when you show up to a session with your boys and your a little ahead of the game. got your dutchie rolled up and ready to blaze
Josh: yo you wanna blaze? i got some mids and my bowl?

me: fuck that, i got us a PRB of headies right here
by hirethan9 May 13, 2010
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PRB is short for Pappy Road Block. This is a management employee who hinders progress within an organization. This individual would also abuse all privileges blatantly in front of direct report employees without remorse and eat skittles like a farm animal.
Tom- "Why do you look so down Bill?"

Bill- "PRB did not show up to work until noon today and I got nothing accomplished!"
by papial February 05, 2010
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Means 'pee right back' taken from the shorthand brb where the first b is replaced with a p.
I drank too much coke, prb.
by Hellsconsort July 08, 2007
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