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diddly

noun [U]
 
/ˈdɪd.l̩.i/ (also diddly-squat) US informal

Definition

anything: He hasn't done diddly all day. There's no point in asking Ellen - she doesn't know diddly.Something, anything, nothing, and everything
(Definition of diddly noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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