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
The ability to spot racists before they appear, specifically Jayda Fransen of Britain First political Nazi group.
"I was minding my own business and my Jaydar started tingling and then next thing I was surrounded by racists"
by Susan Donym March 29, 2015
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