noun. A talent for detecting highly-evolved sex monkeys.
Related terms: gaydar, straightdar, bi-dar, dykedar, Hindu-dar, Jewdar, fagdar, queerdar, homodar, 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, ass-dar, asshole-dar, Pretentious Club-going New York Assholedar, "someone is staring at my ass"-dar.
Real citation: "Dear woopwoopkitty (woopwoopkitty?), Mr. Spader should be pinging your gaydar, straightdar, bi-dar, sexual geniusdar. From what I've read, he basically views sex as The Final Frontier--something of crucial and central importance to be explored."
(idwtgtb, "Boston Legal," Nov. 9, 2004, Television Without Pity, http://forums.televisionwithoutpity.com/index.php?showtopic=3116831&st=375)
Made-up citation: "My sexual-geniusdar must be on the fritz; all I ever meet are sexual shitheads."