Webster's Revised Unabridged Dictionary · 1913

Diddle

Diddle , intransitive verb

[Compare Daddle.]

To totter, as a child in walking. [Obsolete] — Quarles

Diddle , transitive verb

[Perh. from Anglo-Saxon dyderian to deceive, the letter r being changed to l.]

To cheat or overreach. [Colloquial] — Beaconsfield