The sixth sense, that most bisexuals have, that acts like radar and can detect another bisexual from across a crowded room.
Sasha felt so out of place at her cousin's birthday party because it was filled with nothing but couples. Then, all of a sudden, her bi-dar went off and she saw a cute, uncoupled person walking her way. (Maybe this party wouldn't be so bad after all!)
by kittykat85 February 03, 2010
(BY-dar) An intuitive sense that enables someone to identify another person is bisexual. Simular to gaydar.
Sensing someone's bisexuality purely through thier physical appearance is nearly impossible, thus a person with bidar is hard to find.
by OneBadAsp October 28, 2006