1. When a person becomes bored with masturbating with ones own hand, and experiments with external objects.
2. Vagina or penis
Tom: After masturbating for 30 years I think its time to find a hand substitute.
Jerry: Maybe you shouldn't be a 40 year old virgin
The act of two males coming together in an intimate setting where they face each other naked and proceed to combine their erect penises in a twisting motion.
Thomas: Last night Marc and I finally consummated our relationship with a nice bagel twisting session.