j-dar
A magical power that lets you sniff out Jews from a mile away. Like gaydar, but with more bagels and fewer drama queens.
'I knew he was a Jew before he even opened his mouth. His momma told him he was gonna be a Jew.'
'She walked in and I could tell she was a Jew before she said hello. I could smell the matzah.'
'He had a bar mitzvah and I knew he was a Jew. I could feel it in my bones.'