Noun
A contest of skill in which two people try to top each other's offerings, especially one involving musical ability.
Something typical of a stereotypic hillbilly; Something characterized by lack of education, poverty, inbreeding or lack of sophistication.
Source: en.wiktionary.orgI really want to rant about my own self-doubts, but then I’d just be starting some awful “Battle of the Self-doubters” Dueling Banjos (Why is it banjos when one of the instruments always seems to be a guitar?) type of deal. Source: Internet