the ability to sense--without being told and without obvious visual clues--that someone is gay.
Female A: He may be fine as frog hair but you won't get anywhere with him because he's gay.
Female B: How do you know?
Female A: 'Cause I've got GAYDAR!
by Elaine E. July 16, 2008

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A radar detecting the homosexuality of someone or something. Gaydars are not physical devices, rather a small part of the brain used to factor characterisitcs such as voice, actions, excitement and tightness of pantwear together to get a gayreading. gaydars also do not measure any kind of speed, so don't be an idiot and see how fast you can pitch a baseball with it, or you'll lose it.
So you guys, does derek really walk the other side of the sidewalk?
Well, my gaydar on him is through the roof.

I hear Jane bats for the other team.
Hm, she does have a pretty high gaydar.

Tellitubies have the worlds highest possible gaydar.
by Sawyer June 12, 2006

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Same as Radar but detects the flame within a man....aka his gay-ness. You must be extremely blessed to have this ability. Often called the 7th sense, Gay-dar can do wonders for you.You must be one with the flame to fully accomplish Gay-Dar
**"Whoa that guy is flaming...he is definately light in his loafers."
**"How do you know he is gay?"
**"Uh hello?! Gaydar...psh get with it, gaydar tells all."
by C Babi June 23, 2004

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Extra sensory perception that allows one to immediatey know who is a homosexual.
Origin: The combination of the words "gay" and "radar".
Harry set off my gay-dar.
by Allora December 02, 2003

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A person's gay-radar, A person's innate ability to accurately identify someone as a homosexual or not.
I've got a good gaydar. He's setting off my gaydar. My gaydar is on code red right now. She's got an overactive gaydar; she thinks everybody is gay.
by mikey Dizz September 08, 2008

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Gaydar is the ''sixth sense'' that any gay man or lesbian woman has built into their genes that allows them to detect anyone within their immediate area who is also a ''member of the family''. Gaydar is NOT based on whether a gay man is flamboyant or whether a lesbian is masculine. Gaydar is activated and does detect other gays whether they are openly gay or not.
Maria: ''Angelo, I need you to tell me whether or not my new male friend is gay, because these days, one can never really tell.''

Angelo:"Maria, my gaydar has not gone off, so no, he's not gay. Trust me."

Maria:"Thanks Angelo. I knew that you'd tell me if my new crush really liked men more than he wanted to let on."

Angelo:"No biggie. What good is having gaydar if I can't use it to help my best girlfriend?"
by IkeishiiDai November 15, 2009

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the ability to point out a homosexual
dude! my gardar's going off
watch out, i'm picking up a reading on my gaydar
by Oilersrule May 02, 2007

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