A twiddle dick is the opposite of a chode. Almost physically impossible, this penis goes inside the body, almost like a vagina, except not. Twiddle. Inward. PENIS
I couldn't have sex with him because he had a twiddle dick!
Moving you penis in a side to side motion very quickly; A form of Grinding.
Josh was doing the Twiddle dick while grinding on Stacy and she was loving it.