noun. The ability to detect willies-causing creeptasticness, squickage, and barf-me-outitude.
Related terms: gaydar, straightdar, bi-dar, sexual-geniusdar, hickdar, loserdar, boob-dar, penis-dar, big dick-dar, hair-dar, porn-dar, sex-dar, food-dar, sleep-dar, money-dar, ho-dar, slut-dar, babe-dar, virgin-dar, jailbaitdar, hottie-dar, weirdo-dar, jerk-dar, moron-dar, dorkdar, skankdar, freak-dar, ass-dar, asshole-dar, Pretentious Club-going New York Assholedar, someone-is-staring-at-my-ass-dar, “Jesus Freak” dar, zombie-dar, fake-boob-dar, camel toe-dar, dogdar, catdar, ratdar.
Real citation: “I think he either knowingly, or by accident, was part of sending her on that flight. He was REALLY creepy I think. Maybe that is nothing, but I tend to listen to my creepydar when it starts to ping.”
(March 26, 2006, http://www.lost-forum.com/archive/index.php/t-33295.html)
Made-up citation: "My daughter will be raised with a honed creepydar and retractable, unbreakable claws, like Wolverine. And she'll have all the Barbies and cheeses she desires."