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1.
A sound made by motorcyclists when they attempt to define the iconic sound of a throaty (usually single cylinder) race engine with a short exhaust pipe as it is given a quick handful of throttle
When that guy did the backflip on his 450 he blipped the gas twice mid air. It was like, "brawp BRAWP!"
by PapaBRAWP December 03, 2013
 
2.
gay dirtbikers make this noise
brawp brawp! vroom vroom!
by black shawty June 14, 2007