noun. Not sure what this means, but you should wash your hands afterwards, just to be safe.
Real citation: “Not to mention the possible situations: public wanking! Shower wanking! Prefect's bathroom wanking! Dormitory wank! Wankcest! Lessons in wankology! Broomstick wankage. Wandwank. Pre-Quidditch jitterwank. Detention wank.”
(“The Harry Potter Wankathon,” http://community.livejournal.com/hp_wankathon/profile)
Made-up citation: "You children should never take candy from strangers or respond to online ads for jitterwankers. They also should avoid licking nuclear weapons without parental supervision."