Jewdar en · NOUN
Etymology
From Jew + -dar.
Meanings
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(slang, uncountable) The supposed ability of a person to detect or intuitively sense whether another person is Jewish.
And slap on a gag order if we dare say that these traits triggered our "Jewdar" (my Semitic equivalent of gaydar) and allowed us to identify someone as a fellow Jew.
2001, Ophira Edut, “Bubbe Got Back: Tales of a Jewess with Caboose”, in Danya Ruttenberg, editor, Yentl's Revenge: The Next Wave of Jewish Feminism, Seal Press, →ISBN, page 30:So she was Jewish. It wouldn't have occurred to me, but Melissa always faulted my Jewdar.
2011, Lawrence Douglas, The Vices, Other Press, →ISBN:The name Grossman, the physician father, the mention of Florida—my Jewdar went whirring away, strongly suggesting that he could be a member of the tribe.
2015, Joseph Epstein, Masters of the Games: Essays and Stories on Sport, Rowman & Littlefield, →ISBN, page 82: