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.
A woman's menstrual cycle.
"Rae, the red machine came today."
See period, rag, aunt flo, tampon..