A fork of Rural Dictionary
masturbating with one finger in a "come hither" motion.
she went to the bathroom to finger diddle herself.
Euphamism for female masterbation
Boy, does that girl like to finger diddle.
One who puts his/her fingers into the rectum of another and proceeds to wiggle his/her fingers.
That large man, after sticking his fingers in the little man's ass, became a diddle-fingers.