What is Underground Boombox?
1.
the act of beatboxing into a woman's vagina during cunnilingus in order to give her pleasure some rhythm.
I gave her an underground boombox when i went down on her so that even if I wasn't that good, she could at least enjoy a catchy beat.
See
Random Words:
1.
One who sucks, strokes, or otherwise works the dome of another man's penis until it "busts" out with a boatload of cum.
..