Another name for a dirtbike, snowmobile,
quad, or any
toy with a
small displacement engine. Also can be used with any number of a's to describe the sound of one of these toys in uses...
Expl.1) Hey bro, go grab your
brap brap and let's go to the gravel pit and ride!!!!!
Expl.2) He came around that corner before the triple and he was
like "brap brap braaaaaaaaaaaap!"