Top Definition
An ability to identify an individual as a man or a woman. This is often used in cases of crossdressing, or cases where one gender will bear close resemblance to the opposite.
Boy: Hey, that girl on your binder's hot!
Girl: Girl?! You mean Shinya? Shinya's a dude, man. Looks like someone needs a new guydar.
by Marina Rose October 11, 2007
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