Someone's ability to sense if someone is gay or not when it's not obvious.
Q) What is your gaydar telling you about that waiter.
A) It's pinging loudly hey.
by Galawh May 27, 2019
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The gift of being able to sense the homosexual vibe.

Extended form : Gay Radar
He's flaming!--Told you there's no stealthing my Gaydar!
by ~SS August 7, 2005
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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 16, 2009
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A person's ability to sense the homosexuality in another.
"Seriously. My gaydar goes off when he's near."
by chineeeeeeeeese April 27, 2009
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A person's ability to tell if a person is gay/homosexual/flamer etc.
Bob - "Man, I swear that guy's gay."

Jose - "He's gay, my gaydar is really good, and your friend steve is also gay."
by b W i t September 3, 2005
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A persons ability to ACCURATELY tell if people around them are actually homosexual. Without asking the suspect or anyone who knows them directly or indirectly.
Person of "happier" inclination walks into a bar in a backwater, where incest is the norm but gays are burned at the post and manages to get laid with a local of the same sex from said bar would be said to have good gaydar and some pretty good moves!
by speculation November 17, 2009
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Ones abililty to feel if someone is being gay.
When Harry made out with Fred my gaydar went off
by Slagathoere April 26, 2017
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