Top Definition
Short for Shady Radar. An ability that all sheltered white people believe they posses, but is only accurate in a small percentage of them. Similar to gaydar, but instead measures the likelihood of a person or thing to commit or be involved in criminal activity.
"That kid in the glasses over there looks chill, but my shaydar says he's a low-key drug dealer."

Sheltered white kid one: "Uh oh, watch out, there's a skin head coming down the street"

Sheltered White kid two: "Nah, don't worry, that guy is just trying to look hard, he doesn't even register on my shaydar"

"I hate driving through Compton, it makes my Shaydar go crazy"

"Watch out, that cop car reads a negative 4 on my shaydar, but the cop driving it is an 8!"

"That windowless white van over there is making my Shaydar tingle!"
by SB-HippieSage December 26, 2009
A method of detecting someone who's shady, sketchy, or untrustworthy.
As soon as I saw his eyes darting back and forth uneasily, my shaydar went off...
by Beckett17 February 11, 2011

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