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Noun: diddly  di-d(u-)lee
  1. A small worthless amount
    "you don't know diddly-squat"; "you don't know diddly-shit"; "you don't know diddly"
    - jack, doodly-squat, diddly-squat, diddlysquat, diddley, squat

Derived forms: diddlies

Type of: small indefinite amount, small indefinite quantity