The gift/abilty of being able to tell what ethnic background a person is from, simply by looking at them.
Mary: "Peter, what country are you from again?"

Veronica: "Why, he's half Italian, half Salvadorian, with a little bit of Irish."

Peter: "How could you have known that?"

Veronica: "I am a tank; I have awesome racedar, duh."
by rndmgrl November 26, 2009
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Radar for race issues, allowing one to sense a racist, racism, etc, in their immediate vicinity. Sometimes this racedar can be all wrong, but sometimes right on. Usually physically manifests itself as a "gut feeling".
My racedar told me that when the White guy in the truck with the Confederate flag on the back called me his "Nigga" he did not mean "friend".
by Night Nurse June 16, 2006
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