Meaning of bumbass in English:

bumbass

Pronunciation /ˈbʌmbeɪs/

noun

informal, dialect Music
  • Any of various stringed instruments having a bass or droning tone; (now) specifically a type of folk instrument consisting of a monochord stretched on a long pole over a resonating bladder or drum, typically played with a stick or bow to produce a bass note or rhythm, and often having other percussion instruments attached.

    In earliest use applied to a bass violin or violoncello.

Origin

Late 18th century; earliest use found in Samuel Pegge (1733–1800), antiquary and writer. Apparently from bum + bass.