Definitions by whitepeoplelikedubsteptoo!

masterbassing 

The act of self pleasure while listening to dubstep or any other bass heavy music.

Toby: Did you see Danny at that Excision concert last night?
Luke: Yeah man, he was totally masterbassing all over the place.
Toby: And when that bass dropped?
Luke: Yeah...I'm pretty sure Danny had to change his pants afterward.

masterbassing by whitepeoplelikedubsteptoo! February 20, 2011