bidar

plural bidars

1. slangThe ability to detect whether or not a person is bisexual by observing that person.

   Though I _think_ he's straight: but then my bidar isn't always running at 100%.

   1999 October 22, Kay Dekker, “Re: crush server redux”, in soc.bi (Usenet)

   2 more examples

   Bi people hang in straight places a lot, and given that you are also bi, they will probably stand out to you in an indescribable, nonverbal way. And that, my friend, is bidar.

   2006, Nicole Krista, Mike Szymanski, The Bisexual's Guide to the Universe: Quips, Tips, and Lists for Those Who Go Both Ways, Alyson Books, published 2006, →ISBN, page 131

   Of course, not all bisexuals are recognizable, and many will easily defy the bidar, whereas others will appear to be bisexuals without actually identifying as bi.

   2013, Shiri Eisner, Bi: Notes for a Bisexual Revolution, Seal Press, published 2013, →ISBN

1. A city in Karnataka, India.
2. A district of Karnataka, India.