Brrapt is the onomatapeia used when jumping or drivng something such as a golf cart or a bicycle.
It is the sound the dirt bike make s when excelerated off the lip of a jump.
and in the whoops it is: brra ba ba ba ba ba ba ba bap
If you catch someone brapt'ing at work, acknowledge by exclaiming "Brapt Brapt!" or "Brrrrrapt!" as they pass by.