Definition of "diddley" []

• A small worthless amount (noun)

WordNet. Princeton University. 2010.

• "The name also recalled the diddley bow, an African single-string guitar that was seminal to blues music."
• "This week on Hidden Treasures, host trevor Reekie previews the exceptional voice of a visitor playing at this weekend's Womad festival who surprisingly manages to infuse a swamp blues standard with Anglo-Egyptian electronica, as well as exploring the unique origins of an instrument called the diddley bow."
• "The slide technique derives from a homemade one-string contraption known as the diddley bow, a childhood toy of many American blues pioneers and similar to African stringed instruments."