Theadar is similar to gaydar or Jewdar except that it is the ability to detect those who work/volunteer in theatrical productions or were involved in theater in their youth but moved on to non-theater related professions. It is especially relevant for performers. It is more often applied to those who used to participate in theater but no longer do so. It often refers to lingering personality traits that can't be masked when moving away from the theatrical world.
My equine science teacher is attractive, charming, has a really outgoing personality, is really good at pantomime and talks about his favorite movies a lot. I told him I thought he would have made a great actor or comedian. He said he used to do theater when he was a boy. Inside I just knew it! I must have good theadar.
by qween rachel March 01, 2009