noun. A keen, ha-ha-detecting sense.
Related terms: gaydar, straightdar, bi-dar, hickdar, loserdar, boob-dar, penis-dar, hair-dar, porn-dar, sex-dar, food-dar, sleep-dar, money-dar, ho-dar, slut-dar, babe-dar, virgin-dar, hottie-dar, weirdo-dar, jerk-dar, moron-dar, dorkdar, skankdar, freak-dar, ass-dar, zombie-dar, Pretentious Club-going New York Assholedar, "someone is staring at my ass"-dar, “Jesus Freak” dar, jailbait-dar, fake-boob-dar, big-dick-dar, catdar, ratdar, dogdar, Christiandar, Catholicdar, wingnutdar, sexual geniusdar.
Real citation: "I have what a call my "funnydar." This job has screwed with my funnydar. I used to have a pretty good feeling of confidence when I was being funny, but now I don't know."
(Ana Marie Cox, "So What Do You Do, Ana Marie Cox?," March 30, 2004, Mediabistro, http://www.mediabistro.com/articles/cache/a1376.asp?pntvs=1&)
Made-up citation: "Singing mice--of the non-Disney variety--get a high reading on my funnydar."