Citations:straightdar

Noun: "(slang) the ability to detect whether or not a person is heterosexual by observing that person"

 * 1996, Judy Carter, The Homo Handbook, Fireside (1996), ISBN 0684813580, page 163:
 * Above all, be very careful about whom you tell that you are straight. Try and find other straight people, but it will be hard because everyone will be trying to act gay. Use your "straightdar."
 * 2008, Robin Sawyer, Sexpertise: Real Answers to Real Questions About Sex, Simon Spotlight Entertainment (2008), ISBN 9781416959243, page 177:
 * Gay or straight, we've all made incorrect assumptions about someone's sexual orientation, so the likelihood of “gaydar” or even “straightdar” as a meaningful idea is unlikely.
 * 2013, Tom Ryan, Tag Along, Orca Books Publishers (2013), ISBN 9781459802995, unnumbered page:
 * I told you I had great straightdar. I'm great at helping girls figure out boys and giving fashion tips and stuff. In case you haven't noticed, I'm the only out gay student at Granite Ridge High School.
 * 2008, Robin Sawyer, Sexpertise: Real Answers to Real Questions About Sex, Simon Spotlight Entertainment (2008), ISBN 9781416959243, page 177:
 * Gay or straight, we've all made incorrect assumptions about someone's sexual orientation, so the likelihood of “gaydar” or even “straightdar” as a meaningful idea is unlikely.
 * 2013, Tom Ryan, Tag Along, Orca Books Publishers (2013), ISBN 9781459802995, unnumbered page:
 * I told you I had great straightdar. I'm great at helping girls figure out boys and giving fashion tips and stuff. In case you haven't noticed, I'm the only out gay student at Granite Ridge High School.
 * Gay or straight, we've all made incorrect assumptions about someone's sexual orientation, so the likelihood of “gaydar” or even “straightdar” as a meaningful idea is unlikely.
 * 2013, Tom Ryan, Tag Along, Orca Books Publishers (2013), ISBN 9781459802995, unnumbered page:
 * I told you I had great straightdar. I'm great at helping girls figure out boys and giving fashion tips and stuff. In case you haven't noticed, I'm the only out gay student at Granite Ridge High School.