jug band

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a kind of small string band or jazz band using simple instruments, as guitars, harmonicas, and kazoos, and makeshift ones, as washtubs or empty jugs

Origin: from the jug used to produce bass notes by blowing across the opening

See jug band in American Heritage Dictionary 4

noun
Music

A group that uses unconventional or improvised instruments, such as jugs, kazoos, and washboards.

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