The amazing ability to sense gay or bi (tho mostly the first) by apperence, personality, how they talk, move breathe, practically how they sleep.

Usually the gay/bi ones are always the good looking ones. ie: Nick Lachey, David Beckham, Channing Tatum, Ryan Carnes, Chad Michael Murray

and usually the ugly one's are hetero.
ie: Dick Chaney, George Bush and Bill O Reily (sad isn't it)
Kate: This guy Dave is like a total hottie!
Jeff: Dave? he's gay, my gaydar pinged when i saw him
Kate: ohh thats too bad. who else is gay?
Jeff: Your husband
Kate: Noooo you lie you fag!
Jeff: I slept with him so take that you fat bitch!
by AndreaCow January 28, 2006
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like radar on a car. only for gay men or lesbian women.
"wow. my gaydar went off the scale when Sean walked by me."
by iLoveJosh<3 November 18, 2007
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A mental radar for telling whether someone is gay
1) I have a pretty good gaydar

2) My gaydar says that guy is definitely gay
by Penguin AWESOMENESS June 25, 2013
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A play on the word radar. Describes a person's ability to identify a person's sexual orientation, mostly based on outward sources such as appearance and demeanor.
You like HIM?! Do you HAVE a gaydar???
by joleisabeisa May 30, 2009
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Noun,

1. The uncanny ability or supernatural power possessed by most gay men, lesbians and fag hags to detect gayness in others. Is highly effective, especially if the object is in the near vicinity.

2. An imaginary internal machine that registers and detects radiated gayness. A gay-o-meter.

3. An obnoxious but addictive website for gay men to post personals and pictures, hook up with others and diss anyone who isn't a Chelsea queen or gym bunny.
1. Sam says he's straight, but my gaydar tells me otherwise.

2. The cute new temp at work is setting off my gaydar.

3. Man1: How was your date last night?
Man2: Awful. He didn't look anything like his Gaydar pictures.
Man1: So did you have it off?
Man2: Of course.
by dancingqueen March 8, 2005
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A radar to decect if there is a homosexual near by.
I think you set off my gaydar
by DizzyLizzy December 21, 2006
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The ability to detect homosexuals in any given area. Made popular by a cartoon character named Bender from the show Futurama.
*blatantly homosexual person walks by*

My gaydar is going off the chart!
by Irish August 22, 2003
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