Jewdarn.
/ˈdʒuːdɑː/, U.S. /ˈdʒuˌdɑr/ slang.
An ability, attributed esp. to Jewish people and likened humorously to radar, to identify a (fellow) Jewish person by intuition or by interpreting subtle signals conveyed by appearance or behaviour.
ΚΠ
2000 O. Edut in Utne Reader Nov. 51/1 These traits triggered our ‘Jewdar’ (my Semitic equivalent of gaydar) and allowed us to identify someone as a fellow Jew.
2019 N. K. Maxwell Typically Jewish vii. 173 Sami's mother's Jewdar enabled her to detect not just individual Jews, but where they lived.
This entry has been updated (OED Third Edition, December 2019; most recently modified version published online March 2022).
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n.2000