Noun
An emasculating type of male
masturbation where a sissy rubs the underside of his/her/its clitty with
one fingertip. The limited stimulation is designed to increase sexual frustration rather than bring sexual satisfaction.
The verb form of this practice is sissy
diddle, present participle is sissy diddling, past participle is sissy diddled.
Within sissy communities, the sissy qualifier is often dropped and they simply refer to it as diddles, diddle, diddling, or diddled.