1. (verb) To train your sphincter to become prehensile for the purposes of enhanced pleasure during anal sex.
2. (noun) A prehensile rectum.
3. (adjective) A grasping asshole.
1. "Thanks to my Dockery, I'm very popular at prison."
2. His Dockery "developed sort of teeth-like little raspy in- curving hooks and start eating. He thought this was cute at first and built and act around it, but the asshole would eat its way through his pants and start talking on the street, shouting out it wanted equal rights. It would get drunk, too, and have crying jags nobody loved it and it wanted to be kissed same as any other mouth. Finally it talked all the time day and night, you could hear him for blocks screaming at it to shut up, and beating it with his fist, and sticking candles up it, but nothing did any good and the asshole said to him: "It's you who will shut up in the end. Not me. Because we don't need you around here any more. I can talk and eat AND shit."
3. "Don't be a Dockery!"