A thing of little or no value See examples of diddly used in a sentence. He hasn't done diddly all day Slang a small or worthless amount His advice wasn't worth diddly to me American heritage® dictionary of the english language, fifth edition.
Meanings, etymology, pronunciation and more in the oxford english dictionary Definition of diddly noun in oxford advanced learner's dictionary Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
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