The compounding of "Bass" and "homo". The word is synonymous with Audiofag and Sonicqueer, but refers to the level of bass in the music instead of the actual music volume in the the space.
Person1: Yo, I can feel the bass in my body. I'm starting to feel numb.
Person 2: Wow, you bassomo. I always new it! You love it when I turned up my system in my car and why you used to sit on subwoofers!