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2.
The ability to detect that somebody was on Jeopardy!
My Jaydar was pinging when I saw the familiar Ken doll head of Ken Jennings.
by raincloud314 January 07, 2011
 
1.
The ability that allows one to detect marijuana intoxication.
According to my jaydar, those two young people are high on marijuana.
by streethawk September 02, 2007