Knuckle Puppet 

A girl who that you are doing stuff with, but have not quite decided whether shes going to be main biddy or not.

Johnny: You dating that girl yet?

Mikey: Nah man, shes still just my knuckle puppet

Knuckle Puppet by The D peice August 20, 2011

Two Knuckle Puppet

The act performed when a male or female inconspicuously inserts their hand into clothing of a female while in a social setting. A finger is then inserted into her vagina and is manipulated in way that will cause stimulation. The puppet master continues the finger movement as the puppet continues to interact with others in the public setting. The period of time the act is performed is often referred to as a "two knuckle puppet show".

The look of embarrassment came across Jill's face as the dog pulled down the jacket she had draped across her lap, exposing Jack's hand pushed deeply into Jill's Pants, causing their two knuckle puppet show to come to an end.

Two Knuckle Puppet by Snatch(Beer30) May 3, 2011