beat out

Listening to music loudly and often obnoxiously.

Typically, in a car with a sub so big the neighbors across the street two blocks away wake up.
Derives from something like "Let's listen to some beats" or "Jam out" but with bass-heavy beats.

*Friend picks up friend*
"Yo I just got a new sub and amp you want to beat out?"

"sure"
*turns subs on and radio up*