Knob and Knuckle

A sexual act performed by a male/female couple and a third which can be male or female. The couple prepare for sex in the doggie styleposition. The third party then cups the male's balls in the palm of their hand and extends their middle finger out and along and against the bottom of the male's cock. The male then proceeds to enter the vagina filling her with both his cock and finger of their partner at the same time. Thus giving her a satisfying knob and knuckle.

A knob knuckle is the term used for accidentally grabbing a testicle during the act of male masturbation, then yanking it swiftly up into the centre of an erect penis, giving a knee cap, or knuckle type appearance in the centre of the shaft.

- To knob knuckle someone is to cause them pain through some form of passive aggressive behaviour, often resulting in some subtle yet severe psychological trauma.

- To be a knob knuckle is to perform activities in a careless fashion, not paying full attention to the task in hand.