A low-frequency sound or instrument which is used to enhance music or provide some sort of musical ground. Most modern music uses electronically-generated bass synths, while traditionally-created music uses low-frequency instruments for the bass.
Bass can also be referred to an audio setting that makes the low frequencies of a song more pronounced.
The bass was set so high the stereo speakers got fried when the next song began to play.
BASS in the colloquial description used in situations where someone is so overweight the fat on their BACK hangs down and merges with their ASS with no obvious demarcation between the two (i.e. their Back combines with their Ass to form a new single body part - their BASS).
Also refer to GUNT (i.e. a merged Gut and Cunt) and GENIS (i.e. a merged Gut and Penis).
“Check out the BASS on that massive lady. I can’t tell where her Back stops and her Ass begins"...