diddly /ˈdɪdəli/exclamation 1noun 2forms 1 exclamation1 •A written representation of a trill sound....When combined with the following picked note, this gives a rhythmic 'diddly-dum' effect. — 2005 noun2 •(informal) A small amount of no worth.They head down the mountain, back to base camp, and when they get there they don't say diddly. They don't talk. Not a word, like they're deaf and dumb. — 1990 •(informal, slang) penis"My child is going to be taught all about sex as soon as he can understand. Mother-in-law is always clucking to him about his diddly. No, no, I say, you must call it penis." — 1968 formsdiddlies
