look up any word, like spook:
Refers to the sound used in many drum&bass and even more dubstep tracks: a low sub-bass sound rattling your ribcage.
This sound is usually put under a beat.
There is a difference between a 'wobble' and a 'brraaap' but don't ask me what it is ;)

Also: An expression to state something is cool
Brraaap! What a bassline, dude!
by Mr.Zee March 24, 2008